Some of the biggest stars of the music world from all different genres came together in NYC wednesday night to celebrate the launch of VEVO. Justin Timberlake posed with John Mayer, who recently shared his ideas on how to get away with secret texts. Taylor Swift posed in her LBD while Taylor Lautner was elsewhere in the city preparing to host SNL and releasing the first cute promo. Rihanna smiled big after a publicly trying year and perhaps could give some advice to Adam Lambert who has had his share of controversy, though he's been asked to perform on the finale of SYTYCD. Meanwhile, Nick and Mariah just looked smitten as usual.

There was also time for some performances during the party including Bono and Lady Gaga who was a little more toned down than when she met Queen Elizabeth in London the night before. John Mayer also took the stage and hugged Taylor Swift as his new album featuring a duet with the country starlet climbs the charts. Even up-and-comer Justin Bieber got in the fun, posing with Shania Twain. There were a bunch of congratulations to be handed out to the group, many of who were nominated for Grammys last week.

Lady GaGa is inimitable. She kept her pace even at the Royal Variety Show in London where she was invited to entertain the Royal audience.

he star appeared wearing a red leather dress with a 20ft long red train. The dress had a huge ruffle on the neck. Perfect red boots and huge circles of sparkling red eye make-up completed the look. According to GaGa her outfit was inspired by Queen Elizabeth I.

The singer performed Speechless song – the one she wrote for her father. During the performance GaGa was suspended on a swing and her train hung down touching the surface of the floor.

Juggling quite the hectic schedule, Lady GaGa was spotted sneaking in a pint at a London pub on Sunday evening (December 6).

The “Poker Face” singer was decked out in an all-white ensemble, flashing her derriere as she stumbled into an awaiting car.

As for the day’s agenda, GaGa was among the stars taking the stage on the season finale of “X Factor,” during which time she performed her latest single, Bad Romance.

From there, it was off to Blackpool, where the 23-year-old was lined up to perform for the Queen and the Duke of Edinburgh at the Opera House.

According to AP reports, the star-studded variety show sees all proceeds “go to the Entertainment Artists’ Benevolent Fund, which cares for entertainers who need help as a result of old age, ill health, or hard times.”