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"Can't say I'm thrilled our song leaked but...," Britney tweeted. "I AM super excited that my fans seem to love it as much as @iamwill and I do. What do you guys think about #ScreamAndShout?"
Will.i.am wrote, "@britneyspears I am so happy people like #screamANDshout...I can't wait until they see the video...my #iamangels are your #britneyarmy=LOVE."
This isn't the first time the pair worked together -- they did collab before on her Femme Fatale song "Big Fat Bass."
Because of all the song leaks, Will.i.am said that Willpower, originally slated for a Dec. 7 release, will be pushed back. He told Billboard that fans can expect an album in early 2013.
Speaking of the leaked track with Britney, he lamented: "Well, that's done. You can't undo it. It's out. It made it real."
The song will officially release later this afternoon, and the music video for "Scream and Shout" will premiere Thursday on "X Factor."
Take a listen to the tune below:
- Katy Perry's Red Carpet Fashion Through the Years
- Katy at Esquire Magazine's 'The Envelope Please' Oscar Viewing Party
- Katy at Step-Up's Fourth Annual "Fashion Forward
- Katy in Concert in Berlin
- Katy at VH1's 14th Annual Critics' Choice Awards
- Katy at the 2009 Grammy Salute to Industry Icons
- Katy at the 51st Annual Grammy Awards
- Katy at the 51st Annual Grammy Awards Press Room
- Katy on the The 52nd Annual GRAMMY Award's Red Carpet
- Katy at the 2010 EMI Grammy Party
- Katy at the 2010 American Music Awards
- Katy at the 2011 Logie Awards
- Katy at the 53rd Annual Grammy Awards
- Musicians Who Look Like Cartoon Characters
- Taylor Momsen and Kung Fu Panda
- Taylor Swift and a Japanese Anime Character
- Miley Cyrus and a Chipette from Alvin and the Chipmunks
- Nicki Minaj and Rainbow Brite
- Fergie and Janice from the Muppets
- Rihanna and Cleo, the fish from Pinocchio
- Nicole Scherzinger and Jasmine from Aladdin
- Accident-Prone Pop Stars
- Kelly Osbourne
- Justin Bieber
- Jessie J
- SkyBlu of LMFAO
- Sean "Diddy" Combs