The "Hello" hitmaker fired the gun so that lucky fans who received the merchandise could "buy a drink" on her, reported Contactmusic.
But before she could hand over the presents to her fans, Adele had to make her way to the middle of the audience at the 43,000 capacity Domain Stadium where she quipped her long sequined dress was making her hot and sweaty.
She told the crowd: "The weight is going to fall off of me on this tour. The sweat is dripping down my thighs.
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