The long-awaited Friends reunion is finally up on HBO Max! The show’s six stars — Jennifer Aniston, Courteney Cox, Lisa Kudrow, David Schwimmer, Matthew Perry, and Matt LeBlanc, all returned along with big-name guest stars like Lady Gaga, Justin Bieber, and Mindy Kaling. Tom Selleck, who played Richard, and Maggie Wheeler, the unforgettable Janice also returned.…