Kesha can be a "total psycho".

The American rapper and singer admits her latest song `Your Love Is My Drug' is about being obsessed with someone, something she can relate to.

She told Sony Ericsson's Pocket TV: "It's a song about how when you're in love with someone, and you start acting like a total idiot psycho. You know, just like stalking. Chain calling. Calling from other numbers."

Asked whether or not she indulges in that behaviour, the 23-year-old hitmaker said: "Yeah... but not from my phone."

Despite a penchant for developing unusual tactics to win men over, Kesha claims she hasn't always been like that, and spent her school years being a "geek".

She said: "I was a math geek. And a band nerd."

The singer recently admitted she is less than pleasant to anyone who crosses her, and has given "dog s**t" as a gift to someone before.

She said: "You know what, sometimes I'll walk my dogs and full bags full of massive dog s**t. Then I'll wrap them as Christmas presents and give them to people."