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There’s more to singer-songwriter Mikky Ekko than his breakout hit, “Stay,” a moody 2013 duet with Rihanna that immediately brought the vocalist born John Stephen Sudduth to the attention of casual music listeners. Not that the track is anything to dismiss: The song topped charts around the world and won the duo a Grammy soon after. But since then, Ekko has refined his brand of radio-ready pop, releasing his debut album, Time, in January with an array of fresh material from the bubbly “Smile” to the breathy, stark piano ballad “Mourning Doves.” Collaborations with artists as diverse as David Guetta, Lil Wayne, Sam Smith, and Gwen Stefani further Ekko’s genre-blending style: He easily transitions from belting chintzy choral ballads in the vein of Ed Sheeran to experimenting with electro-pop and R&B elements. The Nashville-based artist offers a track for everyone, making his music a crowd-pleaser that can summon dance moves from concert-goers of all tastes. Mikky Ekko performs with Transviolet at 7 p.m. at U Street Music Hall, 1115 U St. NW. $15. (202) 588-1889. ustreetmusichall.com.