Kesha gave her producer, Dr. Luke an over-the-top lovey dovey birthday card that makes it seem like their relationship is anything but abusive ... according to new docs filed by Luke.
The card reads, "You just keep getting hotter every year" -- and includes a handwritten note from Kesha which starts with the words ... "To the FOXXY-est producer EVER!"
Her note continues ... "Thank you 4 helping me make my WILDEST dreams come true!" She closes with a gushing, "I LOVE YOU!"
Luke submitted the card as an exhibit in his defamation lawsuit against Kesha -- who, of course, is suing him for sexual assault. Luke's attorney claims the card is from 2009 -- several years after Kesha alleges Luke started abusing her.
Also in the docs -- warm, fuzzy emails Luke says he got from Kesha's mother. One reads, "I hope you know, as much as you have been there for Kesha and me, that we will always be there for you, as family, and friends, if you need anything."