Heidi Klum stopped by the UCLA campus for a game of capture the flag with singer Natasha Bedingfield this afternoon. The ladies were there to support The Heart Truth campaign, a cause that Heidi has been involved with before. She participated in the charity's annual fashion show along with other famous faces last year, and the red dresses will be back on the catwalk to kick off New York Fashion Week next Wednesday. Heidi just returned to sunny California after a trip overseas where she promoted the makeup brand Astor and partied with fashionable pals. She's not slowing down any time soon though, as her new TV series, Seriously Funny Kids, premieres on Lifetime tonight!