The 31-year-old model said she had a strong urge to do the same when she was pregnant with son Flynn, reported Contactmusic.
"I wanted to cut my hair when I was pregnant. I had such an urge to cut it really short. I'd like to and you'll see I'm sure in a few years. I have a (faux bob) though. I like to mix it up. One day, I'll cut it for real," she said.
"I can't leave home without having fresh, clean hair. I wash it every second day unless I'm working back to back days, then I like to keep it fresh. There's nothing better for me after I've freshly washed my hair and I'll let it dry on its own.
"I just love that feeling of clean hair because it's like a little luxury in life. After I get off an airplane the first thing I do is wash my hair. If my hair is not clean I don't feel my best.