MTV birthday posts for Bill and Tom!

Everyone's favorite twins, Bill and Tom Kaulitz, are 21 today, guys! And we threw Tokio Hotel a big, huge birthday party last night. With Muppets! Seriously*! Check it out. Things got a little rowdy when that little girl almost knocked over the three-tiered cake, but Tokio Hotel fans are exuberant, aren't they? Bill refused to wear his party hat, but with hair that perfect, you can't blame him.

If you're still shopping for the Kaulitz twins' birthday present, we have a few gift ideas below. Vote and tell us what you think would make the ideal birthday present for Bill and Tom. And wish the twins a happy 21st birthday in the comments!

* No, not seriously. We wish, though.

Raise a glass to Tokio Hotel frontman Bill Kaulitz, who turns 21 years old today. The German singer and fashion icon is already something of an industry veteran, performing with his twin brother Tom since he was 10 years old. They plugged away quietly as Black Question Mark until they met Georg Listing and Gustav Schafer, who filled out their band and turned them into Devilish. The young band continued to play shows and attempt to get discovered until Bill performed on the German version of "Star Search" in 2003. He didn't win (he was eliminated in the quarter-finals), but his one-of-a-kind voice and unique sense of style scored his band a recording contract. They changed their name (again) to Tokio Hotel, and the rest is history.

Tokio Hotel were instant sensations in their native Germany, melding together pieces of punk, metal, glam and dance music for a new, vibrant stew. Their first album Schrei (which means "scream") became a hit, moving over a million copies worldwide (interestingly, some songs were re-recorded a year later when Bill's voice dropped due to puberty). They followed up with Zimmer 483, but it was their first English album (Scream, which contained remakes of songs from their first two albums) that really kicked it up a notch. They made huge inroads into America, where they were greeted with the same sort of fervor that they received elsewhere in the world.

A true international band, Tokio Hotel have wooed fans with universal music and a truly forward-thinking sense of fashion and style. (Thousands of words have been written about Bill Kaulitz's hair alone.) Bill has plenty to celebrate today, so happy birthday to him.

What would you get Bill Kaulitz for his birthday? Let us know in the comments!