Rihanna: Thai Lemongrass Girl!

Rihanna and her BFF Melissa lunch at the Thai Lemongrass Restaurant on Tuesday (May 18) in Glasgow, UK.

The 22-year-old “Rockstar” singer took the time to sign autographs for a few fans before hopping into her car.

Earlier today, Rihanna sported a bright red wig in a preview for her new video, “Rockstar 101″!

In July, Rihanna will launch her “Last Girl On Earth” tour, where she’ll be joined by Ke$ha.