Ariana Grande opens her “The Eternal Sunshine Tour” with a three-night run at Oakland Arena on June 6th, June 9th, and June 10th. These are the very first shows of Grande’s first major tour in over six years, and the opening-night demand reflects it. T”he Eternal Sunshine Tour” is a sprawling run of arena shows that grew from an initial 34 dates to more than 40 after Grande added nine dates to meet demand, leaning on residency-style stays in a handful of cities rather than single stops. Oakland has three nights, which means fans here got three cracks at the on-sale – and all three sold out quickly anyway. If you missed out during the initial sale, you’re in good company; this is one of the most in-demand pop tours of the year, and Oakland has the added pull of being the night Grande launches the whole thing. Get Ariana Grande Oakland Tickets Here But all hope is not lost: Below, find more details on how to secure last-minute tickets from legitimate buyers.…