Hayley Williams surprised fans on Wednesday by bringing out Billie Eilish to sing the hit track, All I Wanted, during Paramore’s concert stop in LA at the Kia Forum. 

The Still Into You hitmaker, 34, who has been enjoying the group’s U.S. trek on their This Is Why tour, previously jumped on stage with the Ocean Eyes songstress, 21, last year during the Coachella Music Festival.

During the encore portion of the night, Williams was singing the 2009 song and after only the first verse, introduced Eilish to the cheering audience, per Billboard. ‘Please welcome our friend Billie Eilish,’ she gushed.

The fellow singer stepped out under the stage lights wearing an oversized, black T-shirt as well as black Nike shorts to belt out the lyrics in a viral Twitter video that captured the special moment.

As both singers pelted out the high notes at the very end, the crowd applauded loudly in the stadium, and prompted Hayley and Billie to fall into an excited embrace as the music came to a close.

Surprise! Hayley Williams, 34, surprised fans on Wednesday by bringing out Billie Eilish, 21, to sing the hit track, All I Wanted, during Paramore’s concert stop in LA at the Kia Forum; seen in May in Boston

Special guest: During the encore portion of the night, Williams was singing the 2009 song and after only the first verse, introduced Eilish to the cheering audience, per Billboard; seen earlier this month in LA

‘Dream Come True!’ Billie Eilish performs onstage with Paramore

However, Wednesday’s collaboration was not the first time the pair took to the stage together to show off their impeccable vocals.

Last year in April 2022, Billie notably headlined the annual Coachella music festival and brought out Paramore’s Hayley Williams where they both sang Misery Business and also Happier Than Ever.

Shortly after the festival, Eilish was asked by a fan what her favorite Paramore song was, and in response, the Grammy winner replied, ‘All I Wanted,’ according to Billboard.

Along with performing on stage together, the two performers also have a close bond behind-the-scenes as well.

Last year, Williams had the chance to spend Thanksgiving with Billie and try out scrumptious vegan cinnamon rolls made by Eilish’s mother which she told Sirius XM’s Alt Nation in December 2022.

‘We had already connected, I had connected with her mom too, just about their organization that they have,’ she explained. ‘But ever since that Thanksgiving cinnamon roll treat, just, I mean… The rest is history. I feel like I would do anything for them.’

Paramore’s lead vocalist also explained that she sees her younger self in Billie, who also jumped to fame when she was in her teenage years. ‘We’ve spoken throughout the years since she kind of came onto the scene.’

‘The first thing I experienced or I witnessed of her was When the Party’s Over, that video. And then I watched an interview with her and I felt like there was something inside of me that was watching me, slash us, as teenagers doing interviews and navigating this world,’ she recalled.

In the past: Last year in April 2022, Billie notably headlined the annual music festival and brought out Paramore’s Hayley Williams where they both sang Misery Business and also Happier Than Ever

Very close: Last year, Williams had the chance to spend Thanksgiving with Billie and try out scrumptious vegan cinnamon rolls made by Eilish’s mother she told Sirius XM’s Alt Nation in December 2022; seen in November 2022

Billie Eilish rocks the pink carpet at the Barbie premiere

‘She does it on a level we’ve never experienced, but I just feel such a love towards her and her family and I think they’re so special,’ Hayley gushed.

On Thursday, the Bad Guy hitmaker jumped to her main Instagram page to reflect on having the chance to sing All I Wanted with Hayley on stage.

She shared snippets of the duet on stage, and also added a throwback video of herself when she was younger doing a gymnastics aerial routine performance to the 2009 track.

In the caption, the songstress could hardly contain her excitement and penned, ‘UGHHDKSLDJSKFJKSKFUDJSKKFKDKDK dream come truEEEEEE @paramore waaahhhhhhhhhhhhhhhhhh.’

Billie added, ‘i love you so much hayley holy shit. wish i could tell tiny me :’)))) @yelyahwilliams.’

Eilish also shared another throwback clip on her Instagram stories from her routine that she performed to All I Wanted and typed out, ’10 year old me doing my favorite aerial routine i used to do LMAO. my faaaaavorite song man :’).’

Hayley kicked off her This Is Why tour with her band, Paramore, in tribute to the album of the same name which was released earlier this year in February.

The U.S. trek kicked off a few months earlier in May and the group is slated to stop by other cities such as Seattle, Tulsa, and also St. Louis, before heading abroad to Australia and Europe with dates that come to an end in August 2024.

The group, which was founded back in 2004, consists of Hayley, and also drummer Zac Farro and guitarist, Taylor York – whom Williams is currently dating.

Along with focusing on their own concert dates, Paramore will also be an opening act during Taylor Swift’s Eras Tour during her 2024 European trek. Hayley also appeared on Speak Now (Taylor’s Version) and featured on the vault track called, Castles Crumbling.

Reflecting: On Thursday, the Bad Guy hitmaker jumped to her main Instagram page to reflect on having the chance to sing All I Wanted with Hayley on stage

Longtime fan: She shared snippets of the duet on stage, and also added a throwback video of herself when she was younger doing a gymnastics aerial routine performance to the 2009 track.

‘Dream come true’: In the caption, the songstress could hardly contain her excitement and penned, ‘UGHHDKSLDJSKFJKSKFUDJSKKFKDKDK dream come truEEEEEE @paramore waaahhhhhhhhhhhhhhhhhh’

Keeping busy: Hayley kicked off her This Is Why tour with her band, Paramore, in tribute to the album of the same name which was released earlier this year in February; seen in February in Arizona

Other collaboration: Along with focusing on their own concert dates, Paramore will also be an opening act during Taylor Swift’s Eras Tour during her 2024 European trek; seen earlier this month in Denver

Coachella: Billie Eilish brings out Paramore’s Hayley Williams

Ahead of the album’s re-release, Williams expressed her excitement to be a part of the LP and how the album affected her upon its original release in 2010 in a lengthy Instagram post last month in June.

‘Taylor was the first industry friend I ever made and hung out with outside of work things,’ she typed out to her fans and followers along with uploading a throwback snap of Swift.

‘When Speak Now dropped, I bought my friend’s record (as you do!) and listened to the whole thing in my first car, sitting still in the driveway. It’s my favorite Taylor Swift album for so many reasons.’

She concluded, ‘I wish I could go back to this moment at my 21st birthday and tell her one day she’ll legitimately own Speak Now and we’ll get to sing together on one of the songs.’