Ben Affleck really knows how to please his girls! He took his kids Violet, 9, and Seraphina, 6, not only to the Taylor Swift concert, but also backstage to have the happy daughters personally meet with the singer.

"They all had a great time," one source told the ET Canada. "This was something they really wanted to do."

"Everyone was ecstatic!" said the source. "He was excited, as were they."

At Taylor Swift's epic 1989 concert night, she had an awesome lineup of cool stars to perform with her. Everyone remembers "Smelly Cat" from Friends. This song was performed onstage by Swift and Lisa Kudrow! Swift also sang duets with Selena Gomez and Justin Timberlake.

"The girls had been really wanting to go," a source tells the People magazine. "He was super excited to be there with them. They had a great time."

Recently, Ben visited his wife Jennifer Garner and his children Violet, Seraphina, and three-year old Samuel in Atlanta last week. But now the kids are all back at Los Angeles with their dad, while their mother Jennifer has stayed back for the movie, Miracles from Heaven.

"Ben spent the whole weekend focused on the kids," a source said. "They all seemed to have a fun weekend. Ben took them on several outings and looked happy."

Affleck has been sporting his wedding ring on and off, reports ET. He was spotted without his wedding ring one day before the concert. However, Ben was wearing the ring when he was with his kids over the weekend.