Plus new Elvis album is set to top the official UK album chart
TV host appears alongside Billy Eichner as distant trick-or-treaters
Justin Bieber stuck at Number Two with his single 'Sorry'
The show will be recorded at New York's Radio City Music Hall on November 17, airing on December 14
Clip reached the milestone in five days, just behind Psy's 'Gentleman'
New single is picking up one million views an hour
Singer also expresses her admiration for former contestant Ella Henderson
"I loved her and I went through my own massive grieving process as her fan"
British singer will follow previous effort '21' on November 20
It will be the singer's first televised performance since 2013