Britney turns 30?! How did that happen? We swear she was just 21, in all her poppy princess glory. Yes, we’ve chosen to block out the intervening hot mess, head-shaving, baby-rearing, meltdown-having years. And fortunately she appears to have somewhat emerged on the other side. (Let that be a lesson to you Lindsay Lohan!)
Britney celebrated in a relatively simple way – by ice skating with her boyfriend in Houston. Of course, nothing is ever totally simple for a celeb right of passage. Meanwhile, her famous friends were sending her well-wishes and homemade videos. Kim Kardashian sent her wish via a video on Celebuzz:Â “Happy birthday to the beautiful Miss Britney Spears! Welcome to the 30’s club, Brit!!”
Lady Gaga, Justin Beieber, Rihanna, Katy Perry, Ke$ha, Heidi Klum, Miley Cyrus, Ryan Seacrest and many other sent their fond regards, which Britney no doubt enjoyed reading while hanging out  with her sons Preston, 6, and Jayden, 5.
Britney goes back to South America Saturday for her tour, playing a free show in Mexico City this weekend.