Cosmopolitan’s Chelsea Ballroom, Aug. 20

Tickets for the buxom Brit singer, which started at $100, had sold out within hours. And for good reason. During her Saturday night concert, the mature 23-year-old proved to be the best soul artist of this generation with her grasping voice, passionate tone and powerful lyrics. She engaged the audience with meanings and tales behind her songs, jokes about her pet dachshund getting fat and more than a dab of bitterness toward ex-boyfriends. Though emotional pop-ballads may be an acquired taste, anyone could enjoy this expressive cup of tea.