I would hang on to those Diane Krall posters fow awhile. Right now they would retail for around $50 each.
Krall's first album was released in 1993, but she didn't really get noticed until 1999 with the album "When I Look In Your Eyes." (She won a GRAMMY for Best Jazz Vocal Performance).
She's a talented artist and I think she's going to gain a a lot of fans as she gets more exposure. She's married to one of my favorites, Elvis Costello.