Adele has apologized to fans in an emotional video after being forced to pull the plug on her entire 24-date Caesars Palace residency just one day before it was scheduled to begin. The singer, 33, said she was forced to postpone the residency, which was scheduled to begin Friday at the Colosseum of Las Vegas’ Caesars Palace Hotel, after “delivery delays and COVID” meant her show wasn’t ready in time. “I’m so sorry,” the singer said in a video posted to Twitter on Thursday. “My show ain’t ready. We’ve tried absolutely everything that we can to put it together in time and for it to be good enough for you but we’ve been absolutely destroyed by delivery delays and COVID.” Fans of the singer have splashed out between $85 and $12,000 for a ticket to attend ‘Weekends with Adele which was set to run from Jan. 21 to April 16, and have traveled to the United States …