A possible strum pattern you could try:

/ [G]       / [G][A] /[D]       / [D][Am]/

/ D Dud /  D  D / D Dud / D   D /

"Escape (The Piña Colada Song)" is a song written and recorded by British-born American singer Rupert Holmes for his album Partners in Crime. As the lead single for the album, the pop song was recommended by Billboard for radio broadcasters on September 29, 1979, then added to prominent US radio playlists in October–November. Rising in popularity, the song peaked at the end of December to become the last US number one song of the 1970s. The song is featured in many films such as Shrek and Guardians of the Galaxy, and NBC’s Third Watch.After its release as a single, the song became immediately popular, though initial sales were slow due to the song's actual title, "Escape", going unnoticed in the place of the oft-repeated cocktail. Holmes reluctantly agreed to rename the song "Escape (The Piña Colada Song)". The song shot up through the charts, becoming the last number-one Billboard Hot 100 hit of 1979 (and the last number one song of the 1970s). "Escape" returned to number one again on the Billboard Hot 100 charts during the second week of 1980, having been displaced for a week by KC and the Sunshine Band's "Please Don't Go".Thus it is the only pop song to ascend to #1 on the Billboard pop charts in two different decades.

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