Lady GaGa and Paris Hilton Partying in London

Making the most of their time in the UK, Paris Hilton and Lady GaGa were spotted living it up together last night (January 27).

The “Simple Life” cutie and the “Just Dance” songstress looked to be having a marvelous time as they laughed the night away at the Nokia 5800 launch party, held at Punk Soho.

From there, Miss Hilton hopped into a car, showing off her panties as her yellow printed dress flew up, and headed over to Bouji’s in posh South Kensington around 1:00am.

Meanwhile, GaGa had her own agenda, making her way over to the Roxy nightclub to perform a set with deejay Mark Ronson. Around 2:30am she headed home looking a bit tuckered out.

Then at 7:30am this morning, fully recovered from last night’s festivities, Paris was spotted heading out of her swanky hotel on her way to GMTV, braving the nasty rainy weather.

Following her television gig, Miss Hilton headed back to her hotel to change, before making an appareance on ITV’s “This Morning” to promote her new reality show.