Adele has several wigs that she wears on various occasions due to the fact that it takes so long for her to get ready. When giving Anderson Cooper a tour of her house, she took him into her bedroom and showed him some of her wigs strewn on the bed. Adele also told him that she jokingly gives them pet names, revealing two of them to be "June" (after June Carter) and "Jackie" (after Jackie Collins). 
She wears her wigs on notable occasions, such as to some of her live shows. In Live at the Royal Albert Hall, she wears a wig. It is unknown which wig this is, but could be either "Jackie" or "June".