Rihanna: New Mac Lipstick Unveiled!

Rihanna chats on her cell phone while arriving at LAX Airport on Friday afternoon (April 19) in Los Angeles.

Earlier in the week, the 25-year-old entertainer was forced to postpone her Houston concert after battling an unidentified illness, but she seems to be better now and headed to her concert in Tampa, Fla.

PHOTOS: Check out the latest pics of Rihanna

“#DIAMONDSWORLDTOUR I’m back!!! #Tampa we’re coming to find you!!!” she tweeted.

Rihanna recently unveiled her brand new “RiRi Woo” lipstick for Mac Cosmetics.

20+ pictures of Rihanna at the airport…