Get over it

How do I tell my friend to get over it? I'm a FTM so I ask all my mom friends for advice from time to time. My friend Karen (not her real name) is butt hurt I didn't follow her advice to a T about a particular situation.

It's not that she was wrong, we tried it, it didn't work for us, we tried something else. Now she's having a temper tantrum that I didn't do it her way. Grow up, karen.