LOS ANGELES (AP) — Jamaican singer OMI may seem like an overnight success, but his chart-topping summer hit, "Cheerleader," has been years in the making.He started working on the reggae-pop song seven years ago. He released the track in 2012 under the Jamaican label, Oufah, but a 2014 remix of the song by German DJ Felix Jaehn helped give the tune new flavor — and new life.The upbeat ode to a supportive girlfriend is spending its second week at No.