Suzi Quatro "If You Knew Suzi..."

If You Knew Suzi... is the sixth regular studio album by Suzi Quatro, released at the end of 1978, with a 1979 copyright date. By August 2012 this was still Quatro's highest-charting album in the United States (it peaked at number 37 on The Billboard 200). The album also yielded Quatro's biggest US single hit, a duet with Chris Norman named "Stumblin' In" (which reached number 4 in both The Billboard Hot 100 and the Billboard Adult Contemporary charts. It also had an advertising billboard on Sunset Boulevard.

The credits show the album to be a multinational production: tracks were recorded in Cologne (Germany), Paris (France), and Glendale (California). It was then mixed in California and mastered in London (United Kingdom) to be distributed by a company based in New York City.

Various international versions of the album contained the Vanda and Young-penned song "Evie" instead of "Stumblin' In". When If You Knew Suzi... was re-released as a "two-fer" with the Suzi ... and Other Four Letter Words album, both "Evie" and "Stumblin' In" were included.