Drake will no longer be performing at tonight's Grammy Nominations Concert, TMZ reports.

According to TMZ, Drake backed out of the Grammy Nominations Concert last minute yesterday.

"Unfortunately, due to scheduling complications, Drake will no longer be performing ... [he's] currently in the middle of his nationwide 'Would You Like A Tour?' and sincerely apologizes to his fans that he can't be there," a rep for Drake said.

The "Hold On, We're Going Home" singer, however, does not a concert stop today, so it is unclear what exactly the "scheduling complications" are. Drake's next show is tomorrow, Dec. 7 in Missouri.

Drake had been a planned act for the live performance show in Los Angeles since October.

The show must go on.

Lorde, Taylor Swift and Katy Perry  have joined the Grammy Nominations Concert lineup within the last 24 hours. In addition, Robin Thicke, Macklemore & Ryan Lewis and Keith Urban teamed up with Miguel are still set to perform. LL Cool J will host.

Those who are still performing tonight have been rehearsing in order to prepare for their live performances. Yesterday, Urban and Miguel rehearsed their version of Bill Withers' "Aint No Sunshine" as well as a rendition of "Have Yourself a Merry Little Christmas," Associated Press reports. The pair has never performed together before. Tonight, they will have a low-key performance which will not have a band. Instead, Urban's guitar, a cellist and Miguel's laptop will provide the music.

Next, a "giddy" Lorde practiced her hit "Royals."

Thicke is expected to recruit the help of rapper T.I. as well as Earth, Wind and Fire to perform his summer smash "Blurred Lines."

According to Associated Press, Taylor Swift and Katy Perry's performances will be pre-taped.

The Grammy Nominations Concert starts at 10 p.m. ET/delayed PT on CBS. It is being held at the Nokia Theatre.

The 56th annual Grammy Awards will be held Jan. 26 at the Staples Center.