Ariana was set to appear on The Jonathan Ross Show, but bailed at the last minute...and he totally called her out on it.
Jonathan explained to the audience at the taping: "Ariana is in town. We were told she would be in the car at 6pm to be here for 7 pm, then it got to 7 pm and she was not in the car - 7:30 pm and she is still not in the motherf**king car. So I don't think we can hold out much hope."
He added, "I don't know what it is. We are going to give Ariana the benefit of the doubt and not say anything mean or judgmental. I apologize to anyone who might have come along hoping to see her."
Jonathan did get this dig in, however: "She was booked but the lazy little f**ker has not come. Maybe she has gone to her first Nando's."
In order to fill Ariana's performance time, the show's guests (Joan Collins, Danny DeVito and Sheridan Smith) sang a karaoke rendition of "9 to 5." There's something you don't see every day.