"Society's Child" stigmatized Ian as a one-hit wonder until her most successful US single, "At Seventeen", was released in 1975. "At Seventeen" is a bittersweet commentary on adolescent cruelty, the illusion of popularity and teenage angst, from the perspective of a narrator looking back on her earlier experience. The song was a major hit as it charted at no. 3 on the "Billboard" Hot 100, hit number one on the Adult Contemporary chart and won the 1976 Grammy Award for Best Pop Vocal Performance - Female, beating out Linda Ronstadt, Olivia Newton-John and Helen Reddy. Ian appeared as the first musical guest on the series premiere of "Saturday Night Live" on October 11, 1975, performing "At Seventeen" and "In the Winter". The album "Between the Lines" was also a smash and reached number one on "Billboard"′s album chart. The album would be certified platinum for sales of over one million copies sold in the US. Another measure of her success is anecdotal: on Valentine's Day 1977, Ian received 461 valentine cards, having indicated in the lyrics to "At Seventeen" that she never received one as a teenager.