Kate Hudson Smooching With Ex!

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It's only been four days since Kate Hudson ended her relationship with Lance Armstrong — and our spies have already spotted the actress smooching in the street with her ex, Chris Robinson!

The source tells OK! that Kate arrived at tiny Teteboro Airport in New Jersey yesterday in the early afternoon and took a car with her son Ryder to her SoHo apartment, where they were met on the steps by Chris.

"They were really affectionate with each other and gave each other a kiss which lasted much longer then a platonic kiss should last — 20 seconds, maybe a little longer.

"Without going into all the details the kiss was more than just friends. They seemed like something more going on and were very affectionate with each other."

A pal of Kate's tells OK!, "She and Chris have always been close and she turns to her exes after most of her breakups."

And just yesterday Perez Hilton revealed that Kate was "holed up" with another ex, retired hockey star Eric Lindros, at her mom and dad's place in Canada, although pals say there nothing romantic between them.