Ke$ha blonde london uk radio one studio Spread Pictures

Ke$ha made an appearance on Nick Grimshaw’s morning show at BBC Radio One Studio in London, and the 25-year-old singer smiled sweetly for fans and photogs on the way out. What, no middle fingers or snarly faces? Not only has she glammed up her wardrobe a bit in recent weeks, but it seems like she's growing up too.

K Money is currently promoting her new album Warrior, which features Iggy Pop and The Flaming Lips' Wayne Coyne. "It was maybe the best experience of my life [working with Iggy]!" she gushed today. "He is like the epitome of punk rock! No, he didn't wear a shirt to the studio and I was so happy he was topless! I have been harassing him for years! I like to stalk people - it's one of my hobbies. I like to weasel my way in there and this time it worked! I just bother people until they have to acknowledge my presence; I bother the hell out of them."