Sunday night, Ariana Grande returned to the stage for the first time since a suicide bomber murdered 22 people outside her Manchester Arena concert on May 22. Yesterday, “One Love Manchester” was held at the English city’s Old Trafford Cricket Ground as a benefit for the British Red Cross; the star-studded gig focused less on soliciting donations than celebrating the lives of those who were killed in last month’s horrible terror attack. In front of a crowd of 50,000, Gen-X st