When Rebecca, Miguel and Nicky are singing Hooked on a Feeling Rebecca looks at herself in the rear-view mirror and she touches the scarf she's wearing. When looking at her reflection she's seen wearing a ring, but then not wearing one when she turns back.
Nicky and Deja are seen traveling in present day by bus and plane. On both no one is wearing masks which would definitely need to be worn on public transportation during this time.