Nicole Richie is ready to have fun in the sun in 2013.
The reality star-turned-fashion designer, 31, showed off her fit figure on Instagram, posting a photo of herself paddleboarding in a blue bikini.
"New Year... New Beginnings," she wrote.
The "Fashion Star" mentor, who has two kids -- daughter Harlow, 4, and son Sparrow, 3 -- with husband Joel Madden, admits she loves to work out and stay in shape. She, like Gwyneth Paltrow, is a huge fan of trainer Tracy Anderson's Dance Cardio classes.
"When I first came to a class, I heard I was going to be there for an hour and a half. I was like, 'Oh, I don't do that,'" Richie told Anderson in 2011. "And now I'm in there two hours a day, four days a week. It's so fun and the time flies by and the music is great."
All that hard work pays off! Check out Nicole's bikini body below: