FORT WORTH, Texas -- Zahna Medley scored 17 points and sparked the go-ahead run late in the second half to lift TCU to a 70-66 upset over No. 16 Oklahoma State on Saturday night.

Chelsea Prince and Veja Hamilton contributed 15 points apiece, while Donielle Breau added 12 for TCU, which shot 52.1 percent from the floor on 48 attempts.

Trailing by six late in the second, TCU (10-4, 2-1 Big 12) took its first lead of the game with a bucket from Hamilton that made it 65-64 with 5:16 left. The go-ahead score came during a 12-2 run that was sparked by Medley's 3-pointer and stretched across the final 7:23 of the game.

Oklahoma State (11-3, 1-2) shot 56.6 percent from the floor but was edged 14-4 in made free throws.

LaShawn Jones scored 20 points for the Cowgirls before fouling out, while Brittney Martin added 17 points and Liz Donohoe had 16.