Model Mommies Heidi Klum & Molly Sims Karaoke For UNICEF

Too cute!

It's almost gravity-defying how models like Heidi Klum and Molly Sims could ever carry bumps like that with those legs!

Last night Molly looked like she was about to pop with baby number one at UNICEF's Playlist With The A-List event in El Lay. Her long, form-fitting brown dress accentuates her bump, and the golden leaf pendant necklace was the perfect accessory.

While she went in to sing Madonna's Papa Don't Preach, Heidi was preparing her karaoke rendition too!

The always busy mother-of-four, clad in a black scoop neck top and ivory jacket, belted out The Village People's YMCA with Tom Hanks.

Such great role models — looking fabulous AND singing pop songs for charity! Brava!

[Image via Nikki Nelson/WENN.]

Tags: baby bump, charity, heidi klum, karaoke, madonna, model, models, molly sims, tom hanks, unicef