WATCH: JT and Shawn Mendes Play Guitar Together

My favorite part from our iHeartRadio Music Festival weekend is definitely Justin Timberlake's performance to kick-off Saturday night.

During Saturday's performance, JT welcomed Shawn Mendes to the stage to perform, "What Goes Around...Comes Around," together. 

Don't forget to relive music's BIGGEST night of the year. Watch the iHeartRadio Music Festival two-night event only on the CW, October 7th and October 8th at 8pm!

J Will

J Will

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