Heidi Klum Brentwood Leni Johan
Heidi Klum Brentwood Leni Johan

As Heidi Klum and Seal prepare their divorce and as Seal is off promoting his new album, Heidi's home with the kids, going it alone ...

The soon-to-be single mom took her brood to their weekend activities Saturday -- Henry and Johan to karate, and Leni to ballet. And what we noticed were the kids' superstar styles -- Henry's sporting an edgy Mohawk and Leni, 6 1/2, is carrying a cell phone!

The Project Runway boss was no less chic -- she wore a $3200 Rick Owens leather biker jacket to run errands. Hey, in LA, weekend casual is still haute couture!