Kendra Wilkinson -- fellow Hugh Hefner ex and 'The Girls Next Door' alum -- had an assignment when she visited Holly Madison on 'Holly's World' (Mon., 10:30PM ET on E!).

Madison would soon throw the first pitch at a Las Vegas 51s game. So Wilkinson was there -- in high heels -- to prep the burlesque dancer on throwing a baseball. She eventually took off the shoes, but it made no difference (one can assume) to both ladies' athletic performance.

After many disastrous throws (and catches), Madison said, "I'm practicing under adverse conditions." Wilkinson's advice? "If you don't make it, you gotta look good at least."