We never thought of him as the leather-jacket wearing, motorcycle-riding type, but dayum, Justin looks good atop that bike!

The sexy star caused a ruckus on Sunset Blvd., where JT had to warn paps not to get too close to his bike...or else! (J/k about the "or else", but he certainly looked pissed when they touched his hog!)

He's certainly giving Brad and Ryan a run for their money as the hottest thing on two wheels!