Cameron Diaz and Alex Rodriguez Get Fit in Miami

• Ready to sweat in black leggings and a white tank, Cameron Diaz met baseball star boyfriend Alex Rodriguez for a workout at Equinox South Beach on Tuesday. The lovebirds both hit the Stairmaster, burning calories for nearly an hour. Days before, they’d teamed up for a romantic dinner at Casa Tua in Miami Beach. “They were real low key and just wanted to be alone and talk,” a source tells PEOPLE of their meal.

• Beyoncé was all smiles while exchanging hugs and laughs with friends – and former Destiny’s Child bandmates – Michelle Williams and Kelly Rowland at the Top of the Standard in New York Tuesday night. The trio, there to celebrate Rowland’s new album Here I Am at a Moët Rose-sponsored event, danced with a group of friends as partygoers like Maxwell and Estelle looked on.

• With two days in Paris to film a video for his single “Just in Love with You,” Joe Jonas wasted no time getting around town. The singer was spotted shooting scenes at the pont de Bir-Hakeim, kissing a costar at the Passy Métro station and driving around in a vintage car after a trip across the Pont Alexandre III bridge.

• Jeremy Piven toasted his 46th birthday – and the premiere of Entourage – at CÎroc Cabana Club in the Hamptons. The actor flew in via helicopter, toasting with his own entourage during a sunset cocktail reception that included dinner from Carlyle Off the Green and tunes by DJ Jesse Marco – plus a performance by fire dancers.

• Gerard Butler sought refuge from the heat recently at New York City’s Lucky Strike Lanes, sipping Diet Coke while bowling with pals. Three lanes down, NASCAR driver Jeff Gordon and 4-year-old daughter Ella shared root beers as they enjoyed a quiet dad-daughter outing.

• By CARLOS GREER, JESSICA HERNDON, LINDA MARX, PETER MIKELBANK and DAHVI SHIRA