NEW YORK (AP) – Sen. Barack Obama is making some campaign promises we can be pretty sure he won’t keep.

Appearing Thursday on the “Late Show With David Letterman,” the Democratic presidential candidate delivered a tongue-in-cheek list of his top 10 campaign promises, including a pledge to rename the tenth month of the year “Barack-tober.”

Also on the list is a vow to “appoint Mitt Romney secretary of lookin’ good” and another to “put Regis on the nickel.”

And the No. 1 campaign promise?

“Three words: Vice President Oprah.”

Obama, the latest in a string of candidates to show up on Letterman’s show, appeared just briefly to deliver the night’s list. Earlier this week, candidate John Edwards came on the show only to have his carefully coifed hair messed up by the host.

On Thursday, Obama joked that Lettermen couldn’t repeat that prank, telling him: “you can’t muss my hair.”