Gaga says she can no longer bear to watch the clip for her 2010 track
Pop star joins in with crowd for 'high-fiving and fist-pumping' metal show
Singer says wants to release festive LP of 'jazz standards'
New album on course to shift 250,000 copies in its first week
Singer also says Justin Timberlake was nervous about collaboration
Duo team up for comedy song '3 Way'
'Born This Way' singer is declared world's most powerful celebrity
Listeners have been getting to grips with the new effort today (May 18)
Plus read NME's track-by-track review now