The biggest names in music took over the 2017 iHeartRadio Music Awards — and heated up the red carpet in barely-there ensembles.

Justin Timberlake took home Song of the Year, but we're pretty sure everyone is going to be talking about the fashion, including Halsey's use of a belt as a top and plus-size model Hunter McGrady's completely sheer outfit.

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Fifth Harmony also turned up the sex appeal on the red carpet in coordinating looks and took home the Fan Army award that night.

From Heidi Klum to Best New Country Artist winner Kelsea Ballerini, skin was in at the iHeartRadio Music Awards.

Click through the gallery below for the hottest looks on the red carpet!