While on The Jennifer Hudson Show Wednesday, Pompeo reflected on Swift asking her to join the 1989 single's all-star visual, which premiered at the 2015 Billboard Music Awards.

"Taylor is such a good girl," the 55-year-old said. "I didn't know her, and she invited me to be in the video and I thought, 'Oh that would be fun.' It was the easiest thing."

Pompeo, whose daughter's Stella and Sienna she shares with husband Chris Ivery, added, "That got me so much mileage with both of the girls for a stretch."

"At the time, Chris and I, we do a lot of volunteering for Children's Hospital Los Angeles here," she said.

"They have an amazing program at Children's where they make music for the babies in the NICU and for the parents who have to go to work all day and they can't be with the kids, they record their voices singing nursery rhymes or telling them stories, and they play it for the babies in the day when the parents can't be there."

"It's a really nice program, but they need money to run it," Pompeo said before revealing that Swift didn't even take a beat when asked to chip in.

"So I just got up the hutzpah and asked Taylor, 'Could you write me a big old check for Children's?' And she knew me all of 20 minutes, and that girl wrote me the biggest check without blinking an eye."

In the Bad Blood music video, Pompeo shares a scene with Mariska Hargitay, with both actresses play Swift's all-time favorite television show characters, Meredith Grey and Olivia Benson, respectively.

Swift even named two Scottish Fold cats after Pompeo and Hargitays much-loved characters.

Pompeo is currently making the press rounds to promote her Hulu television drama "Good American Family."