Dylan sang Happy Birthday to "Susie" in his concert in Paris on June 30, 1998. Audio: Bob Dylan - Mama You Been On My Mind & Happy Birthday Paris 1998 - (YouTube) Which Susie might this be? Subject: Happy Birthday to Suzie who? From: email@example.com Date: Thu, 02 Jul 1998 22:55:22 GMT If I'm not mistaken, Clinton Heylin's Dylan chronology reports that, on a previous occasion, Dylan sang "Happy Birthday" for his longtime "dresser," Suzie Pullen. Indeed, one of the previous listings for performances of "Happy Birthday" was June 30, 1986. So she's a much more likely "target" of the song than Ms. Ross.
She also designed the Bob Dylan logo (Eye logo)