Michelle Obama takes the "first lady of late night" title. By our calculation, FLOTUS has appeared on late night shows 15 times since President Obama took office in 2009. She added one more to the count Thursday night stopping by "The Tonight Show Starring Jimmy Fallon." [This video has been updated to reflect the first lady's most recent late night appearance.] (JulieAnn McKellogg/The Washington Post)

FLOTUS’s appearance on “The Tonight Show Starring Jimmy Fallon” Thursday night makes 15. By our count, that’s the number of times Michelle Obama has appeared on late night shows since her husband took office in January 2009.

We’re not sure what it is about late night television, but Michelle Obama is a fan. For that, she wins the “first lady of late night” award. Prior to being first lady, she stopped by “The Colbert Report,” “The Daily Show with Jon Stewart” and “The Tonight Show with Jay Leno.”

Her predecessors don’t even come close to those stats. Hillary Clinton slipped in a visit to the “Late Show with David Letterman” during her last year as first lady. Barbara Bush and Laura Bush have each made at least one appearance on the late-night circuit, but not while their husbands were in office. And Nancy Reagan — thanks to her Hollywood ties — made two stops during her pre-White House days at “The Tonight Show” starring Johnny Carson.

This post has been updated.