The 49-year-old actress discussed the moment during Monday's episode of the talk show, saying Shelton was "so sweet" when she pranked him on the series last week.
"Oh, he's so sweet. I am now a fan of his," she told host Ellen DeGeneres. "I knew him a little bit before but now I'm a fan, and I scared him. I feel bonded."
Bowen waited to scare Shelton in a box disguised as an end table during the show's May 1 episode. Shelton kept his arm on the box and pounded on it for emphasis several times during the interview.
"[I was] terrified. This is Blake Shelton. His hands are the size of a ham," Bowen said.
Bowen herself got a scare during Monday's episode when an Ellen producer dressed as Shelton popped out of the box.
"I was ready to fight him off like he was a White Walker!" she said, referencing Game of Thrones. "I was going to Arya Stark that man."
"So Mother's Day is coming up. I have something for you to give her," DeGeneres said.
"So you're saying there's a chance she's going to ask me to marry her?" Shelton responded. "See how I flipped it around and put it on her?"