"Ooh-Wakka-Doo-Wakka-Day" is a 1972 song by Gilbert O'Sullivan. The song became a top ten hit in the UK, peaking at #8 on the UK Singles Chart, spending a total of 11 weeks on the chart.Gilbert O'Sullivan | full Official Chart History | Official Charts Company It was also the first of three (consecutive) #1s on the Irish Singles Chart for O'Sullivan.The Irish Singles Charts - Searchable Database Note: User must define "Gilbert O'Sullivan" as the search parameter. www.irishcharts.ie. Access date: 28-04-2010. The song reached #3 on the New Zealand Listener chartshttps://www.flavourofnz.co.nz/index.php?qpageID=search%20listener&qartistid=1277#n_view_location search Listener
The song was never released on a studio album, but in 2012 it was added to a remastered version of Back to Front.
In 2013, a single-purpose version of the song which featured 300 people singing a reworded version of the song whilst going about their daily lives was used for an advert for the National Lottery.
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