J.R. Smith: Red Solo Cuppin' It At Drake's OVO Fest

J.R. Smith went the Toby Keith route at OVO Fest in Canada this weekend -- proceeding to party his face off with a red solo cup ... and he looked super turnt.

Smith was with former Cavs teammate Dahntay Jones and French Montana at the festival in Toronto -- sippin' something while sitting at a private VIP area in the middle of the Air Canada Centre.

Fun Fact -- the OVO Fest is same place where Drake publicly claimed victory in his beef with Meek Mill last year ... running anti-Meek memes on the big screen while the crowd went crazy. Remember that?