AMES, Iowa -- Tiffany Bias scored 22 points and 15th-ranked Oklahoma State beat No. 11 Iowa State 69-62 on Saturday, knocking the Cyclones from the ranks of the unbeaten.
Brittney Martin had 14 for the Cowgirls (14-1, 3-1 Big 12), who used a 12-0 run to take control of the first matchup between top-15 teams in Ames in 12 years.
Iowa State (14-1, 3-1) had pulled within 63-60 before Bias hit a floater in traffic and a pair of free throws with 14 seconds left.
Hallie Christofferson had 20 points to lead the Cyclones, who shot just 3 of 17 from 3-point range. Iowa State entered Saturday as the only school in the country with unbeaten men's and women's teams -- but both lost in a span of seven hours.