With one enigmatic photo, this smugly grinning party animal has gone from viral ingenue to media darling. While Riley failed to conjure his famous grin for the Today Show cameras, his owner shed light on the pooch's personal life.

The Today Show hosts had an impressive amount of theories regarding the mysterious source of Riley's smirk. With the possibility of a drug laced cake ruled out by Riley's owner, Matt Lauer's gas-related hypothesis gained steam.