LeBron James: Throws Epic Karaoke Party ... And Headlines

Here's LeBron James proving he's not only king of the NBA (Steph Curry?) but also the karaoke party turn up ... by doing his best Future and Jay Z impressions at a swanky private party in Toronto.

LeBron and his wife rented out an upscale private home in Toronto for All-Star weekend and threw a "Trap Karaoke" bash attended by megastars like Drake, Kevin Hart, O'Shea Jackson Jr., Amber Rose and Fabolous.

The best part was when LeBron himself grabbed the mic ... jamming out a headlining performance of Future's "March Madness" with an encore of Jay Z's "Public Service Announcement."