Katy Perry: 'Prism' Promo on 'Town Hall'!

Katy Perry is all dolled up while attending SiriusXM’s Town Hall to promote her upcoming album Prism on Friday (October 11) in New York City.

On the same night, the 28-year-old singer’s boyfriend John Mayer donned a suit while exiting his hotel in the Big Apple.

PHOTOS: Check out the latest pics of Katy Perry

Earlier in the day, Katy was all covered up while out and about.

The night before, Katy and John were spotted heading out for a romantic dinner at Arlington Club Steakhouse and Sushi in the Upper East Side.

Mark your calendar, Katy‘s appearance on Town Hall will air on Tuesday (October 15) at 12pm ET on SiriusXM Hits 1.