McKellar was joined by her close friends Melissa Joan Hart and Candace Cameron Bure for the big bash at Conrad Nashville. Guests were encouraged to wear sequins -- and they obliged!
McKellar discovered a passion for dance as a contestant on Dancing with the Stars in 2014 and was sure to incorporate it into her salsa disco-themed party. She and ballroom dance instructor Michael wowed the crowd with a surprise choreographed number, followed by a group salsa with instructors for the entire party.
"Dancing truly lights up my soul and gives me a powerful motivation to stay in shape," McKellar said. "I really think it keeps me young in mind, body and spirit."