12/20/2011 08:47 am ET Updated Dec 06, 2017

Rihanna Throws Up Backstage At Portugal Concert (VIDEO)

Rihanna left it all on stage during her recent concert in Portugal.

The pop star ran into some digestion complications on stage this weekend while performing at Lisbon's Atlantico Arena, running off in the middle of her hit "What's My Name" to throw up out of sight of the audience. Dancers came to the fore while she deposited her dinner, but luckily, fans weren't deprived of their star for long.

"yep! i ran off stage to throw up, halfway thru Whats My Name...made it back juuuust in time for RudeBoy" she tweeted to a fan following the show.

Unfortunately, the moment of illness could potentially be a lot less funny that it may at first seem. It was reported earlier this month that the star was put on 24-hour health watch during her tour by her record label following an alleged meltdown backstage in Dublin in November. Sources also said that Mariah Carey's personal trainer has been brought in to help Rihanna get into shape.

In November, it was reported that she was considering taking a year off from work to recoup after a hectic few years. In November, Rihanna canceled shows in Sweden due to the flu.

For fan footage of the incident in Portugal, watch the video below. She runs off the stage around 1:50.