Paula Abdul opens up about the rumoured feud with fellow American Idol judge Kara DioGuardi, her bizarre behaviour on the 2007 reality series Hey Paula, and whispers of drug and alcohol abuse in an interview with ABC News’ Nightline, airing Thursday.

Some highlights:

Paula on whether she has ever abused prescription drugs: “No, no, no, no, no. Will not take those drugs…And you can check my medical records there is nothing like that. I was never on Oxycontin or Vicadin or anything like that. I was on nerve medicine and anti-inflammatories.”

Paula on whether she has ever consumed alcohol before going on the air: “Never. I’ve never been drunk in my life. I don’t like it. It’s not my thing. Spending money on clothes and shoes that’s another thing.”

Paula new judge Kara DioGuardi: “Well, I started her success. And I’m proud of it. Happy of it. I moved a stranger from New York, told her to give 2 week’s notice to Billboard magazine, and moved a stranger into my home in LA. I actually think that Simon got mad that we are friends and that I actually knew her and that her humble beginning began sleeping in my guest bedroom and I just believed in her.”

Paula on whether there is any tension between her and Kara: “I don’t think anyone [can replace me.] First of all Kara says, ‘I could never replace you.’ Whenever there is change it’s not about replacing anybody, it’s about possibly moving on. I love the show, I do. I love what I do on the show and I’m loving it more this season than ever. It’s taken me a while to get comfortable in my own skin with the show.”