Joan Rivers bashed Adele's weight during her Tuesday appearance on The Late Show With David Letterman only a few days after the United Kingdom singer won her first Oscar.

The Fashion Police host talked about her experience attending the Oscars and how excited she was to meet Adele. Letterman replied by calling the Skyfall singer a "lovely woman," after which Rivers held out her hands widely around her and puffed her cheeks, making a joke about Adele's weight.

The Letterman audience was not amused by the reference and booed Rivers, but she continued on by saying, "What's her song? Rolling in the Deep? She should add fried chicken."

The talk show host quickly changed the subject and that was the end of the Adele discussion.

Rivers has poked fun at Adele's weight in the past. She made a nod to the singer's size via Twitter when she posted earlier on Tuesday, "On Sunday night, you could easily pick Adele's Oscar statuette out of a lineup. It was the only one wearing Spanx.

When Adele gave birth to her son in 2012, Rivers reportedly tweeted, "Congratulations to Adele on the birth of her 68 pound 8 ounces bouncing baby boy."

Watch Rivers' interview with Letterman in the video below.

During her Letterman interview Rivers also talked about Jennifer Lawrence's fall on her way to the Academy Awards podium to accept her award for Best Actress in a Leading Role, and made a brief reference to the hatred Oscar-winner Anne Hathaway faces regularly.

The same day as her late night show appearance Rivers was a guest on The View where she made a joke that producers bleeped out in its entirety, which upset Rivers. She was in middle of making a joke about the names of the E! network and WeTV when her entire sentence was bleeped out. Rivers told The Huffington Post she had said the F-curse but did not understand why her entire sentence was bleeped out instead of just the profanity.

"Stupid broadcast," Rivers said. "They should have bleeped the word. What they do is they now have taken away all the joke ... That's why we're starting our own little Internet channel."