Article continues below advertisementRebel Wilson showed off her slimmed-down figure while celebrating her 46th birthday in paradise.The Pitch Perfect star stunned in a bold red zip-front one-piece as she posed atop driftwood in crystal-clear turquoise water. Article continues below advertisementPlunging Red Bathing SuitSource: megaRebel Wilson celebrated her 46th birthday in the sun.Wearing yellow-tinted sunglasses and flashing a wide smile, Wilson struck playful poses before wading through the shallow surf with a group of friends during what appeared to be a tropical getaway.