Rihanna kicked off her 26th birthday festivities early this week, with an impromptu trip to Aspen, Colo., accompanied by a close-knit crew of friends. The “Pour IT Up” singer opted to sit out on all of the NBA All Star events this year, for a little cabin fever.

The bad gal posted the above pic of her best #cabinlife attire, outfitted in thigh-high socks, briefs and a baseball tee. Later, Ri Ri hit the slopes with her friends for a little tubing.

Hit the flip for more photos of Rihanna’s Aspen getaway. – ruthie hawkins/@ruubabie

R. Hawkins

Humble with a hint of Muhammad Ali…