We already knew Katy Perry had plans to wow the crowd, but how would she be topping that much-discussed Geisha-themed rendition of "Unconditionally" at the American Music Awards late last year?
"This time she's bringing it. It's all production," Ehrlich said. "We're taking a trip to Never Neverland on this one. … She's doing 'Dark Horse,' and it's a huge hit right now."
[Related: Grammy Stars Before the Fame]
But Katy and Beyoncé aren't the only big name acts that will be hitting the Staples Center stage. Robin Thicke, Macklemore & Ryan Lewis, as well as country cutie Hunter Hayes are all slated to make big on stage appearances. Though some will be performing their hit songs solo, Erhlich also was quick to point out that the Grammys are known for their unlikely duets and this year will be no different.
"Our trademarks are our Grammy moments when we put people together," he said. "This year, I counted about 10 or 12 of them."
While they're all sure to be incredibly memorable, Erhlich seemed particularly excited about the pairing of Sara Bareilles and Carole King.
[Related: Famous Friends Mingle at the Grammys]
"They're going to do a mash-up," he said, dishing about which songs they will be putting into one performance. "They're going to take one of Carole's classic songs and Sara's song 'Brave,' which affected so many people and was such a strong song this year."
Check out this video to get more secrets to this Sunday's show, and be sure to tune in to "The Insider" on TV tonight for more Grammy Awards show preparations.