Rosanna Arquette was shocked Clay Aiken knocked someone up -- until someone explained the only person he got it on with was himself.
Also in L.A.: Sam Ronson went out without galpal Lindsay Lohan, Heidi and Spencer showed up to a party to take a pic and Dave Navarro was out with a chick straight out of a music video ... or porno.
In NY: The Jonas Brothers were mobbed outside their hotel, Mark Wahlberg took a picture with a parrot and Susan Sarandon showed off her fantastic rack.
Arquette Sis: Aiken Ain't Asexual?
6/12/2008 6:13 PM PDT BY TMZ STAFF
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