'Song Without a Chorus' hitmaker P'!'nk is the first performer to be announced for this year's Billboard Music Awards, so well done P'!'nk.
She'll sing her fairly mediocre Max Martin collaboration 'Just Like Fire' at the awards show in Las Vegas on May 22, which is in approximately one month. A month typically consists of four weeks, one after the other.
Other artists will be signed up too depending on schedules, release dates and whether or not they've been nominated. That is how it works.
(It's likely The Weeknd will be there considering he's involved in 16 categories or something.)