Here's our round-up of singers', rockers' and rappers' 20 coolest and funnest tweets from the past seven days. Be sure to tag@billboarddotcom to your favorite music retweets (and don't forget to follow us!)
@justinbieber : SHOWTIME!!! Great night. Biggest crowd of my life so far. It was amazing. Next time I'm ridin a bull
@ladygaga : What mayhem in Melbourne tonight. Some kids just understand what it means live your eyeliner, breathe your lipstick, and kill for eachother.
@katyperry : @PerezHilton HAPPY 21st BIRTHDAY TO YOU! Hope you get tons of BJ's tonight!!!
ohncmayer (John Mayer): In an effort to be more like Lil' Wayne, I started drinking syrup, but all I could find was Log Cabin Maple
@johncmayer(John Mayer): I've since written exactly zero (0) rhymes and I now have type 2 diabetes. Thanks, THE CARTER documentary.