File this under “things you never thought you’d see”: Conan O’Brien doing burlesque.

]]>“Burlesque” star Christina Aguilera on Monday night’s (Nov. 22) “Conan.” The fun starts about the 7:30 mark in the video above. If you watch the whole thing, you can also count the number of times Aguilera and O’Brien manage to say “assless chaps” (hint: many). Aguilera also talks about how co-star Cher helped her stay in character and about how her 3-year-old son isn’t always impressed with her singing. “Burlesque” opens on Wednesday.