If you don't know of the band Tokio Hotel, you are missing out on a sensation that has swept all of Europe... like the plague. (You can take your T.H. 101 course right here!)

And yes, this is, in fact, a dude (it is singer Bill Kaulitz; band mates are not pictured).

The group regularly sells out arenas in countries like Germany (their home country), Sweden and Portugal; and their young fans have perhaps the most voracious appetite for band pics since the rise of 'N Sync.

Here are pictures of the uber-popular boy band in concert at the Romarock Festival in Rome, Italy, on Sunday.

Keep an eye on the comments area for rabid fans. The same way 'Cujo' is drawn to a bloody limb, they will come!