Lindsey Vonn is more than grateful. The decorated Olympic skier, who recently shared a post to reflect on her success while ringing in her 36th birthday, shared a collection of snaps of her bash in the Bahamas, where she proved she’s still keeping in shape even in retirement and issued a big thanks to those who wished her a happy birthday. "36 and still in the mix! Thank you to everyone who sent me birthday wishes," Vonn captioned a series of pics on Sunday of herself enjoying an epic vacation