As promised, Black Eyed Peas' front man Will.i.Am has finally revealed a clip of his collaboration with Britney Spears. 

The 'Boom Boom Pow' star teased his followers on Twitter yesterday, February 27, by unveiling a few letters from the song's title. Just before midnight last night, he posted a photo of his laptop open on a screen that displayed the words 'The Big Fat Bass', which has now been confirmed as the track's name. 

He followed this up with a few messages to fans that read:

"Im editing the snippet. there are so many parts in this song. I have so many favorite parts. Its difficult to pick which part to show 1st"

"#thebigfatbass the second verse??? I love this section...the beat is nuts here and britney kills it"

"#thebigfatbass or the breakdown??? At this point a brand new beat is revealed. (The sickest beat)"

The clip itself is short at just over 30 seconds long, but features Will.i.Am's trademark vocal style, piano chords and an electro surge shooting through the backing music whilst Britney muses "I can be the trouble baby, you can be the bass". 

Check out the snippet, which will feature on Spears' forthcoming album 'Femme Fatale', here: