By 1983, Benatar had established a reputation for singing about "tough" subject matters, best exemplified by one of the biggest hits of her career, "Love Is a Battlefield" (penned by noted hit songwriter Holly Knight with Mike Chapman), released in December 1983. By then, her sound had mellowed from hard rock to more atmospheric pop and the story-based video clip for "Love Is a Battlefield" was aimed squarely at MTV, even featuring Benatar in a Michael Jackson-inspired group dance number, using Jackson's Beat It director Bob Giraldi and choreographer Michael Peters. This new pop/rock direction was a huge commercial success, with the single remaining today as her biggest hit in most countries. This included it peaking at number 5 on the US Hot 100, number 1 for four weeks on the US Rock Tracks chart, number 2 in Canada, number 1 in the Netherlands (for four weeks ending as the number 2 song for the year), her first Top 30 hit there, and at number 1 in Australia for seven consecutive weeks, her first Top 25 hit there, number 3 in West Germany, number 5 in Switzerland, number 6 in New Zealand, and number 17 in the UK, her first Top 50 song there. It was became her first song to chart in Switzerland reaching number 11 there. The song also netted Benatar her fourth consecutive Grammy Award for "Best Female Rock Vocal Performance".