Wow. Amanda, get it together. Seriously.
Even though Bynes deleted the tweet within two minutes of posting it, Rihanna got wind of it anyway. Zing!
Okay, so they're not really played at once. But this mashup of Katy Perry, LMFAO, Rihanna, One Direction, Carly Rae Jepsen, and more will make you question whether we aren't just listening to the same song on repeat whenever we turn on the radio.