Now legally an adult, Nick Bollea (a.k.a. Nick Hogan) celebrated a fun 18th birthday Sunday by being transferred into big boy prison - a.k.a. Pinellas County Jail's Central Division - where he shall reside in direct supervision housing!

Hulk Hogan, Linda Hogan and bunch of Nick's friends sang "happy birthday" to him over a video monitor, according to celebrity news sources. After that, they were allowed to visit him two at a time. Brooke Hogan? Not present.

Below is a photo gallery of Nick Bollea in honor of the big 1-8.

When does your favorite star turn a year older and (probably not) wiser? Check our calendar of celebrity birthdays and see!