Michelle Obama: President's gray hair comes from daughters

"Even if they’re still nice to you, they basically don’t have a lot of time for you during the weekends. They have sleepovers and … dates," Obama said.

On Tuesday, the first lady said her husband was still struggling with his daughters growing up.

"Fathers in particular, I don't think they really know how they're going to feel until it happens," she said. "There's nothing like the look on his face when Malia is dressed up for a party and she headed out and she walks past him and you can see his face just sort of drop a little bit."

The first lady also touched on her now famous haircut, coyly responding "what bangs?" when asked what inspired the change. Host Robin Roberts, who is undergoing treatment for leukemia, told the first lady she had actually purchased a wig with bangs in December — but had to abandon it after Obama debuted her new haircut around the inauguration.

"Robin had it first!" Obama conceded. "I'm following you!"

The first lady was appearing on the morning talk show to promote a new initiative in her Let's Move campaign, encouraging parents to cook meals where half of the ingredients are either fruits or vegetables. But she also touched briefly on her decision to attend the funeral of Hadiya Pendleton, a Chicago teenage gunned down last month just over a mile from the Obama's home, using the girl's death to push for additional gun control.

"Hadiya was an honor student. One of the things her mother said at this funeral was, 'I did everything I was supposed to do.' And she was absolutely right. She did everything she was supposed to do," Obama said. "She was standing out in a park with her friends in a neighborhood blocks away from where my kids grew up, where our house was, and she was caught in the line of fire. I just don't want to keep disappointing our kids."