Adam Levine was the toast of the Toronto Film Festival Saturday night after his film with Keira Knightley, “Can a Song Save Your Life?” premiered. The film had distributors, including Harvey Weinstein and execs from Lionsgate, drooling, and they arrived to pay homage at a packed after-party at restaurant Patria. Levine’s band Maroon 5 also came to town — on their own dime, we hear — to surprise him. The rockers were spotted toasting with Grey Goose shots in a corner booth at the bash that was done up in chic décor by Hudson’s Bay.