He’s been racking up the frequent flyer miles on his latest World Tour and John Mayer was most recently spotted way up in Toronto, Canada.

The Grammy-winning singer/songwriter indulged a few eager fans with pictures and autographs outside the Hazelton Hotel before heading over to soundcheck at the Molson Amphitheatre.

Continuing on their fantastic Italian vacation, Jennifer Lopez and Marc Anthony were spotted doing a little boating with designers Domenico Dolce and Stefano Gabbana yesterday afternoon (July 7).

The “Waiting for Tonight” mommy and “I Need to Know” daddy made the most of their time in Portofino, Italy and looked elegant as they mingled with their pals with J. Lo sporting a white dress and Marc rocking a white button-up shirt and jeans.

Still pumping out episodes for the new season of Gossip Girl, Leighton Meester was spotted on location in Roslyn, New York yesterday chatting away on her mobile phone.

The Blair Waldorf actress is getting a ton of exposure lately thanks to the hit CW series.  She scored the cover of Lucky magazine as TV’s best dressed new star, and also appears in the August issue of Vanity Fair.

She’s not sexy and fit by accident.  And yesterday, Kim Kardashian was spotted on her way to the gym to break a sweat and burn a few calories.

The “Disaster Movie” cutie looked like she was ready for a real workout, sporting a sports bra underneath a white tank top with a pair of black yoga pants and sneakers as she chatted on her mobile phone.

She’s been flying under the gossip radar as of late, but yesterday, Katharine McPhee and her hubby Nick Cokas were spotted arriving at LAX International Airport.

The American Idol babe looked cute in a blue t-shirt underneath a grey patent leather jacket with a pair of jeans as she toted her Louis Vuitton handbag and luggage through the terminal.

They teamed up way back when on “Me Against the Music,” and now it sounds like Britney Spears and Madonna will be once again working together.

As part of her ultimate comeback agenda, the “Piece of Me” songstress will reportedly be filming a virtual segment to be used on Madge’s upcoming world tour.

Between her budding pop music career and her role on the Reality TV series “Hogan Knows Best” Brooke Hogan has become a household name.

And the blonde babe was spotted in New York City’s West Village on her way to the uber-trendy Waverly Inn last night to grab a swanky dinner with a few friends.

Doing her best Nicole Richie impersonation, Hilary Duff was spotted doing a little retail therapy in the Glendale district of Los Angeles, California yesterday (July 7).

The “War, Inc.” beauty looked totally hippie-chic, dressed in a patchwork circa-1960s-style blue sundress with a big brown belt and a pair of retro-looking sunglasses.