Drake celebrated his 31st Monday night at Poppy, where a massive crowd gathered outside. It was his second party ... he threw an Andy Warhol-themed bash in his native Toronto over the weekend.

On the guest list ... Rae Sremmurd's Swae Lee, G-Eazy, Justin Combs, Jordan Clarkson, apl.de.ap from the Black Eyed Peas. Leo DiCaprio and Tobey Maguire were also there.

Looked like Drake was having fun inside ...