Britney Spears has joined the growing list of stars vying for a duet with Lady Gaga, insisting she'd love to record with the outrageous pop star.

Gaga launched her music career writing pop tracks for artists including Spears and the Pussycat Dolls - and now the Toxic hit-maker admits she'd love to collaborate with her former songwriter.

Spears was overtaken by Gaga as the most followed celebrity on Twitter.com earlier this week, but the pop princess insists she has no hard feelings - because she's one of her biggest admirers.

She tells Pop magazine, "I'm a big fan of hers. Anything's possible!"

Click Here For More Britney Spears Pictures