Most people can wear what they like when they take their kids to the park, but since Heidi Klum's main job is to make the universe awe-struck at her brilliant life, she is not. More to the point, those jeans don't even look very safety conscious - they could get caught on the swings, sweep-up stray children or even be smuggling killer seals. They basically shouldn't be allowed. 

The good news is that this doesn't spell a future trend. Derek Lam had flares on the catwalk for SS 2011 and a few high street chains/celebs followed, but the majority didn't pick up on it - probably because no one really wants to go round with the content of the gutter creeping up the back of their legs like rising damp. To be honest, it actually seems like an insult to compare Klum's jeans to Lam's anyway; those ain't flares they're clown pants. Imagine the look on Nina Garcia's face :(

That's the thing about fashion, one day you're in, the next you're out.