Excluding the musical acts composing Band Aid, Northern Lights, and USA for Africa, 19 different artists reached the top spot for the first time in 1985.
This year, three artists earned more than one chart-topping single: Phil Collins, Madonna, and Tears for Fears.
The three Canadian acts that peaked atop the chart in 1985 were supergroup Northern Lights, Corey Hart, and Platinum Blonde.
Foreigner, Tears for Fears, John Parr, and supergroup USA for Africa each topped the magazine's chart for three issues with their singles.
Phil Collins spent the most weeks at number one, five, with "Easy Lover", "One More Night", and "Separate Lives".