1 of 5 | Demi Lovato arrives on the red carpet at the Met Gala in 2024. She discussed her nearly twenty-year friendship with Paris Hilton on Monday. File Photo by John Angelillo/UPI | License Photo

Sept. 17 (UPI) -- Demi Lovato is opening up about their love for Paris Hilton.

The singer, 33, discussed her friendship of nearly two decades on Watch What Happens Live with Andy Cohen Monday.

"Singing at her wedding was such an honor, and I was so happy that I could contribute to her big day. I love Paris so much," Lovato said in response to a fan question about the wedding.

Hilton, 44, married Carter Reum in 2021. The wedding was also attended by such celebrities as Kim Kardashian and Kyle Richards.