Obama was speaking during a reception he had hosted for the Asian American Pacific Islanders (AAP), which among others was attended by a number of eminent Indian-Americans.
After greeting the almost 300 in the audience with "Aloha," Obama praised the warmth of their welcome.
"A sign of the warmth is the lipstick on my collar," Obama said amidst laughter. He blamed the aunt of Jessica Sanchez Sanchezthe, the runner-up in the 11th season of American Idol, for the mark.
"I just want everybody to witness. So I do not want to be in trouble with Michelle. That's why I'm calling you out right in front of everybody," Obama said.
