text: "Donald Where's Your Troosers?" was a hit in late 1960 and again when reissued in 1989. Stewart is said to have written the song in 10 minutes as he sat, minus trousers, in the lavatory of a recording studio. Stewart included an Elvis Presley impersonation halfway through the song. On the strength of this comedy hit, Stewart toured Australia and appeared on The Ed Sullivan Show in 1968, doing impersonations of Dean Martin. His skill with different accents is also evident on "The Rumour", where the rumour moves across Scotland and into Ireland, with Stewart speaking in a different accent for each place. Stewart's stage shows often included his impersonations of other famous singers, including Tom Jones, Billy Eckstine, Louis Armstrong, Dean Martin, Johnnie Ray, Elvis Presley, Petula Clark and Johnny Cash.
  His albums, such as Scottish Soldier, The Best of Andy Stewart and Andy Stewart's Scotland, were also popular internationally. In 1973 he recorded a "live" album in Johannesburg, South Africa, entitled Andy Stewart in South Africa – White Heather Concert, which also featured accordionist Jimmy Blue, singers Alexander Morrison and Anna Desti and pianist Mark Simpson.
  His international appeal was well-illustrated by his appearance at the 1964 New York World's Fair, attended by many thousands of people. From the early 1960s to the mid-1980s, he frequently and successfully toured Canada, the US, Australia and New Zealand. He appeared in concert throughout South Africa in 1968, 1971 and 1973. He also performed in Rhodesia (now Zimbabwe) as well as in Singapore and Hong Kong. Coming out of retirement in 1991, he began tours at home and abroad once again.