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 / Updated  / Source: TODAY
By Erin Clements

It seems Sandra Bullock had quite the emotional Mother's Day.

During a visit to "The Ellen DeGeneres Show" on Monday, the actress, who is mom to 5-year-old son Louis, revealed that she "cried a lot" when DeGeneres asked how she'd spent the holiday.

"It was all happy tears," Bullock added. "I just cry at anything now."

"But everything he does [makes me cry]," she explained. "He sang me a song that he wrote. He said 'I wrote you a song,' and I didn't have the heart to tell him he plagiarized. But it was, you know, 'Bingo.' You know 'Bingo,' the song."

The proud mom, who adopted Louis in 2010, went on to sing her son's version of the popular children's tune, which began, "There was a mom I love so much and Sandy was her name-o."

"And then he played the harmonica in between and then he just kept looking at me," Bullock added. "He's all boy with a really tender heart."

The "Minions" star went on to reveal that she recently took Louis to Mardi Gras in New Orleans, where he was born.

"You took him to Mardi Gras. What kind of mother are you?" DeGeneres teased.

"I think a good one," Bullock responded. "I think if you're gonna learn, you're gonna learn."

Watch the clip above for the full interview.