BURBANK, Calif. — What's President Barack Obama's most annoying habit?

Practicing his speeches for hours in front of the bathroom mirror? Talking too much foreign policy at the dinner table?

No — first lady Michelle Obama said Friday it's his tennis game. When they play, the president usually wins.

"He beats me quite often," she said on NBC's "The Jay Leno Show," appearing via satellite hookup from the White House. "That gets to be pretty annoying."

The show was taped for airing later Friday evening.

In a brief skit, Leno pushed her to talk about her husband's flaws. At first, she sarcastically said he has none.

"He's perfect," she quipped.

Then she let it out: It's their battles on the tennis court that get her peeved.

It also looks like Bo — the Obamas' dog — is living like a king. The first lady said the presidential pooch celebrated his first birthday earlier this month with a Rose Garden party.

Bo, a Portuguese water dog, feasted on a cake shaped like a dog house that was made out of veal.

"We had a really sweet celebration," the first lady told Leno. "We had party hats."

The first lady told Leno there are White House secrets she will never reveal — she refused to divulge what daughters Malia and Sasha are wearing for Halloween.

"You need security clearance for that," she said.

Leno also wanted to know what she whispers to her husband after his speeches.

"I usually ask him did he take out the garbage," she said.