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If you stop and think about it, there aren’t too many pop stars who have worked harder than [lastfm link_type="artist_info"]Rihanna[/lastfm] this year.

She’s had hit after hit on the radio, not to mention a massive world tour.

And now we’re a bit worried that she’s completely worn herself out because we heard RiRi was feeling a bit under the weather during a concert in Portugal!

What happened? Is she feeling any better? We’ve got those details and more!

During a performance of “What’s My Name?,” [lastfm link_type="artist_info"]Rihanna[/lastfm] had to run off stage to, pardon our French, vomit!

You may remember that she was hospitalized back in October when she came down with a case of the flu, but so far, this seems like it’s unrelated.

At least it wasn’t that serious this time. [lastfm link_type="artist_info"]Rihanna[/lastfm] laughed off the incident, tweeting to her loyal followers:

@SuchAF_cKnLADY yep! i ran off stage to throw up, halfway thru Whats My Name…made it back juuuust in time for RudeBoy—
Rihanna (@rihanna) December 17, 2011

Here’s some footage of [lastfm link_type="artist_info"]Rihanna[/lastfm] performing right before rushing off stage. Do you think she’s looking a little worse for wear?

The rumor mill is running wild with this latest illness, even speculating that the 23-year-old might be pregnant, but for now, we’re chalking this up to exhaustion.

Let’s hope RiRi has some chance to rest over the holidays!

• Do you think [lastfm link_type="artist_info"]Rihanna[/lastfm] is working too hard? Tell us what you think in the comments!

[Source: Pop Dust]