CSI booked Sandra Vergara a.k.a the younger sister of Modern Family actress, Sofia Vergara for a guest-starring appearance  -- TV Line has learned exclusively.

Sandra Vergara will guest-star — and do her own singing — on the Feb. 13 episode of the CBS procedural, playing Silvana, a beautiful Latin pop star who is set to make her long-awaited U.S. debut in Las Vegas when her sister Marta is murdered.

An all new 'CSI' season 13 resumes on January 16, 2013