Who knew David Spade was such a Casanova? His list of Hollywood conquests runs so long, we could barely keep up. From Julie Bowen to Heather Locklear, this jokester has been romantically linked to a bevy of blond beauties. So in honor of David's 48th birthday on July 22, we're rounding up this funnyman's ladyloves -- and a few rumored rendezvous. Click through to see David's ladies . . .