A relatively new pop artist who looks like an badass version of Taylor Swift. That's not an insult, it's the truth.
She's primarily known for her song Tik Tok and appearing in Flo Rida's "Right Round." Not a particularily good singer or songwriter, Ke$ha often writes really crappy lyrics such as "There's a party at a rich dudes house so if ya wanna go then ya know oh" and "Now, the dudes are lining up cause they hear we got swagger but we kick em to the curb unless they look like Mick Jagger", the latter of which doesn't exactly make sense.
That being said, she does manage to write insanely and annoyingly catchy songs.
Anna: OMG! Tik Tok is the kewlest song EVER!!!!!
Alexa: Who wrote it?
Anna: You know, the girl who looks like Taylor Swift dressed up as Britney Spears.
Alexa: Oh, you mean Ke$ha!
Alexa (listens for a minute to Tik Tok): Oh, god. I can't stand another second of this crap. At least Britney's lyrics make sense, even if they are slutty.