Mandy Moore sure is shaping up to be the queen of Throwback Thursday. Just a week after blessing us with this braces and perm combo from her childhood, Mandy celebrated the unofficial Instagram holiday with a snap of her and Justin Timberlake circa 1999. "Summer of 1999. Abercrombie tshirts and bucket hats. Opening for this guy and his band. Look at my nervous smile!" she captioned the photo. Mandy, who broke onto the scene with her debut hit, "Candy," opened for *NSYNC that Summer and toured with the Backstreet Boys later that year. We'd venture to say that both of them have gone on to do big things since this photo was taken; Mandy is keeping our tear ducts busy on This Is Us, and Justin Timberlake is . . . Justin Timberlake.