AceShowbiz -

Beyonce Knowles' pregnancy announcement on Tuesday, February 1 did not only surprise her fans but also Coachella organizers. The music gig's producers are reportedly shocked to learn of the news since Beyonce has been scheduled to headline the event in April.

A source tells TMZ that people behind Coachella had no idea of Queen Bey's pregnancy prior to her announcement. Some of the producers are now concerned about the "Single Ladies" hitmaker's ability to perform. Even though Coachella reps haven't responded to the news, the source is confident that Beyonce won't back out of the gig.

"The show will go on. She'll just borrow Dave Grohl's big chair," the source jokes, referring to when the rock star broke his foot and performed on a "Game of Thrones"-inspired chair on his tour. Grohl even lent the chair to Axl Rose to perform at last year's Coachella when he had similar injury.

Beyonce is no stranger to performing with a baby bump. In 2011, the wife of Jay-Z performed a stunning rendition of her hit song "Love on Top" at the MTV Video Music Awards while five months pregnant with her daughter, Blue Ivy. She was wearing high heels while delivering the energetic performance. She unbuttoned her suit jacket and rubbed her belly at the end of her show.

Beyonce is also scheduled to attend the 2017 Grammy Awards on February 12 where she is nominated in nine categories. Nothing official has been announced, but she is rumored to deliver a joint performance alongside fellow Grammy nominee, Adele.

Beyonce is reportedly around 4 or 5 months pregnant with twins, who will be the second and third child for her and Jay-Z.