Premise: Diana Trask (born 23 June 1940) is an Australian country and pop singer born in Melbourne, Australia. She was a popular country singer during the 1970s in the United States and also was a popular star in her native Australia. In the U.S., she charted eighteen singles on the country charts, of which the highest was the number 13 "Lean It All on Me" in 1974.
Hypothesis: Diana Trask was most popular in the 1970s