Poor Lindsay was so thrilled to see him (after a separation of about three days) that she leapt into his arms and smothered him with hugs.

Meanwhile, Lindsay Lohan's boy toy Calum Best is back in LA.

The drug lover stopped by the L.A. party his honey would have DJed if she wasn't in rehab. Best spent the night "cruising for girls and getting as drunk as he could," says a spy at the opening of Diesel's West Coast flagship store on Melrose Ave.

Calum Best showed up late, shunned photographers and enjoyed Belvedere Vodka straight from the bottle.