Remember “Cheerleader”? That irritatingly catchy bop that spent six weeks atop the Billboard Hot 100 in 2015? Well, OMI is back. The Jamaican hitmaker is angling for another summer smash with a mood-lifting tune called “Bring My Baby Back.” It’s another explosion of dancehall rhythms and good vibes. “Girl I been searching all over the world,” the 33-year-old begins the song.