Lily reminds Ted of their trip to Paris: It was initially reserved for only her and Marshall, but Ted came along with Karen. Karen and Ted got in a fight and broke up before the plane landed. Karen's presence in Paris ruined the whole trip.
Episode: How I Met Your Mother-Say Chese (5×18) March 22, 2010
Himym Karen,Ted,Barney,Marshall
How I Met Your Mother Paris
How I Met Your Mother France
