'Poker Face' singer set for Royal Variety Performance
'The Fame Monster' also includes a new Beyoncé duet
The Monster Ball tour arrives in February
Star's 'pop-electro opera' to hit the road next month
Lady Starlight is to play the Crossfire Halloween Massacre
Singer says rapper is still cut up about VMA incident
Short video shows GaGa carried by a mystery hand
New Yorker admits bizarre obsession with 'iconic' pop punk album
Pop duo unite to design metal-bodied, tangle-free in-ear headphones
'The Fame' singer thanks her "little monsters" for the success of 'Poker Face'