*Video footage of Rihanna running off stage to throw up hit the Internet today, along with speculation that she was completely trashed during the concert in Lisbon, Portugal.

As RiRi performed “What’s My Name” to a sold-out crowd at Atlantico Arena, she could be heard slurring her words before suddenly running off stage mid-song.  “Y’all sound so good right now, Lisbon,” she called to the audience as she walked down the stairs and disappeared backstage. [Scroll down to watch.]

After the show, she took to her Twitter page to explain.

This hurling episode is the latest in a string of headline-making incidents for the pop star during her Loud tour. In October, she was rushed to an emergency room in Sweden and was forced to cancel a number of shows while she battled “the flu.”

Upon her release from hospital, her doctors advised her to seriously cut back on her hard partying ways in order to regain her health.

Earlier this month, she reportedly suffered a backstage meltdown after complaining about being “so light-headed” on Twitter. The singer was subsequently put on 24-hour health watch by her label. Since then, she reportedly reached out to Beyonce for advice on how to cope with her hectic schedule and the toll it was taking on her health.

Below, Rihanna walks off stage mid-song at 3:50.

Different angle…