The actress Jennie Garth, who turns 41 on April 3, showed off her 30 pound weight loss in a tiny, hot pink bikini while celebrating her birthday at the Garza Blanca Preserve Resort & Spa in Puerto Vallarta, Mexico this week. Garth vacationed with her three daughters with ex-husband Peter Facinelli -- Luca, 15, Lola, 11, and Fiona, 6.