Pink and her husband Carey Hart are back together and during an appearance on The Ellen DeGeneres Show Friday, the singer told Ellen that a sense of humor has been the key to success in their relationship.

“I love that you’re happy and you and Carey are back together. So congratulations,” Ellen told Pink.

“We are. Thank you,” Pink said.

“I knew that you would be back together. He’s not you’re ex. You’re singing the wrong lyrics in your song now,” Ellen replied.

“It’s funny now,” Pink said of her hit song “So What,” which contains a several jabs at Carey. “When I sing, ‘He’s a Tool’… now that’s my favorite line! ‘Hi Honey, that’s you.’”