30 Rock’s resident hottie, Katrina Bowden , was spotted taking a dip in the ocean in her bikini on a sunny day in South Beach. Bowden is in Miami, Florida celebrating her 21st birthday. Katrina Bowden plays Cerie on 30 Rock but you probably know her as “that hot secretary”…lol. Photos below, click to enlarge… Don’t forget, to see even more celebrity bikinis, head on over to Mr. Skin … Related Stories: Katrina Darrell: American Idol Bikini Girl,