Sabrina Carpenter performed with Christina Aguilera for the Spotify Anniversaries LIVE: The 25th Anniversary of Christina Aguilera wearing Cardigan with Marabou Pom-Poms ($1,430.00) and matching Knitted Skirt with Marabou Feathers ($980.00) by Blumarine and Christian Louboutin Me Dolly 85 Leather Sandals ($795.00).