Article continues below advertisementNicole Scherzinger stepped off the Broadway stage and headed straight to a tropical vacation.The Sunset Boulevard star, 47, sizzled in a tiny black bikini while celebrating her younger sister's birthday by the pool on Tuesday, August 5.Article continues below advertisementSource: @nicolescherzinger/InstagramNicole Scherzinger flaunted her dance moves by the pool.Scherzinger shouted out Keala Kay Leemon in a sweet dance video to a remix of "Taki Taki" by DJ Snake.