Jenni "with an ‘I’" Rowe is celebrating her 21st birthday today. Happy birthday, girl! As you can tell from the song, she’s a pretty fun-loving gal. A few bonus tidbits about her that you didn’t get from the song: she’s studying hotel management at UNLV, she’s half-Japanese, and I THINK she’s a really amazing cook, though I’m not 100% sure. If you can confirm or deny this fact, please le…