The 'Since U Been Gone' hitmaker is a huge fan of the rapper and loves to perform his back catalogue with her friends, although she worries she looks ridiculous when she does.
She said: "I can't stand when people get up and do karaoke For Real. In fact, it's highly embarrassing. Let the dream go, it's not going to happen! This is supposed to be fun. I love doing things people would not expect me to get up in sing.
"I look hella bad doing it by the way. I look like completely ridiculous. There's a reason I'm single."
The 'American Idol' winner also revealed she hopes her single 'Because of You' becomes her legacy, because initially her advisors were against the song, but it eventually went to number one worldwide.
She added to Entertainment Weekly: "I'd like to be remembered for 'Because of You' I think because I worked so damn hard to get it on an album and just everyone was against it. There was some blood, sweat and tears going on there. I think I'm most proud of that song-just getting it on an album because no one liked it until it hit number one worldwide and everybody was on board."