Justin Bieber fell ill during rehearsals for "Saturday Night Live" with what's suspected to be food poisoning.

The singer is pulling double duty as host and musical guest on this week's episode, and while rehearsing Tuesday got sick, but pressed onward. His manager Scooter Braun tweeted, "Great first day at SNL with @justinbieber ... so he vomited a little bit. Guys a trooper (sic)".

Bieber returned to work Wednesday and blamed food poisoning for his illness, tweeting, "Think i had food poisoning yesterday. rested up... am i nervous? yep. #outofmyelement but im excited."

K945.com will feature clips from this week's show later Sunday.