Heel heights keep getting higher and higher. Sometimes they're called limo heels because they're usually worn by starlets who rarely have to walk! But if you're not a celeb on the red carpet, can you really wear these shoes?!

Strutting her stuff at a premiere party, Alyson Hannigan of "How I Met Your Mother" wears a pair of towering Yves St. Laurent platform sandals. How high can you go? Four-inch stilettos? Pffft. Five-inch boots? Kid stuff. Yves St. Laurent is making a 5.5" ankle-caving platform sandal, and Christian Louboutin is selling a strut-defying 6" pump!