I don't think there is any CK outlet in GTA area, the closest would be the Prime outlet at Niagara Falls.
However, the parent company of CK, Warnaco, has warehouse sale twice a year and they have lots of CK stuffs in an unbeatable price (eg. Bra for $15, a set of PJ is around $20 plus no tax). You are not lucky because their year end sale just ended today (Jan 28, they open from Nov05 til today) and they would change location everytime. Check with www.bestbuys.ca to see if they have another one coming but I think it should be at summer time.