Top-40 heavyweights including Justin Timberlake,
Other pop hitmakers in the lineup, which
But as in its first two editions, iHeartRadio will also showcase rock (with performances by Muse, Phoenix and Thirty Seconds to Mars), country (Tim McGraw and Keith Urban), hip-hop (
And it will drop some old-timers into the mix:
Last year at iHeartRadio,
Listen to Timberlake's new single, "Take Back the Night," below.