Blackhawks left winger busts out an original rhyme during Stanley Cup celebration.
Versteeg had 44 points in 79 regular-season games last season and added 14 points in the postseason.
The Maple Leafs gave up forwards Viktor Stalberg, Chris DiDomenico and Philippe Paradis in the deal.
Toronto also gets the rights to left-winger Bill Sweatt.
The Blackhawks last week traded Dustin Byfuglien, Ben Eager, Brent Sopel and prospect Akim Aliu to the Atlanta Thrashers.