The first ticket lottery will use a serial number that will come with the Blu-ray/DVD release this December.
Some goods (no pictures yet) can be preordered online from 11/8~11/25/2019 @ 11:59 AM.
Event: うたの☆プリンスさまっ♪ マジLOVELIVE 7th STAGE
Dates; 4/18 & 4/19/2020
Venue: MetLife Dome
Ticket Lottery: 12/25/2019~1/19/2020 @ 23:59
Event URL: http://utapri-movie.com/event/7th