Adele fans who manage to get tickets to her Weekends With Adele residency in Las Vegas will have to prove they are fully vaccinated and have a negative Covid-19 test to get in to see the show.The singer, 33, returned with her chart topping album 30 and lead single Easy On Me, and bestowed even more good news on her fans by announcing that from January until April 2022 she would be performing a residency in Las Vegas.She is set to play two shows per weekend throughout the residency at the Colosseum at Caesars Palace, with tickets sure to sell out to the exclusive run of shows.A notice on Ticketmaster reveals that fans who manage to get tickets will have to adhere to strict Covid-safe rules to be admitted to the show.It reads: ‘The Event.