Tanya Tucker: On Kristy Lee Cook's Side

3/15/2008 3:44 PM PDT

Tanya Tucker: On Kristy Lee Cook's Side

TMZ spoke with Marty Rendleman, Kristy Lee Cook's former manager, who told us country legend Tanya Tucker called Cook last night to lend her advice! This wasn't a random call -- the two have a past!
Marty tells TMZ when Kristy was 16, she called Marty (then her manager) to get tickets to an Oregon country fair where Tanya was performing. Marty did Kristy one better -- she talked Tanya into letting Kristy sing a couple of songs on stage! Tanya then took Kristy and her family backstage to hang out.

Marty, who's still friends with Tanya, told her about Kristy being on "American Idol" -- so Tanya got Kristy's number and called her last night. Tanya told Kristy that she was pretty, had a great voice and to just go out there and be herself!

The advice is great -- but Tanya might wanna vote next week.