The two join several other celebrity guests at the One Direction star's 21st birthday bash in Hollywood.
Adele, Jennifer and the actress' Hunger Games co-stars Liam Hemsworth and Josh Hutcherson are spotted at the Waverly Inn restaurant in New York City.
Jennifer was among many celebs who watched Adele perform a special concert at Radio City Music Hall.
The three have dinner at the Cosme Mexican restaurant in New York City.
Jennifer attends Adele's concert in Los Angeles with fellow BFF Emma Stone and The Hunger Games co-star Woody Harrelson.
The two joined many stars at the talk show host and comedienne's 60th birthday bash.
Adele and Jennifer join Cameron Diaz at the annual demonstration.
The two hit up the gay bar Pieces in New York City, where they check out a drag show and play drinking games onstage with the host.