The 1970 Ireland entry to Eurovision seen by very few americans I'll bet, and the performance has its equally spectacular history. And yes, it has the mandatory swooping oo-OO at 2:58.
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From
Wikipedia: "The entry was politically sensitive as Dana came from Derry in Northern Ireland, yet was representing Ireland, not the United Kingdom. At this time The Troubles in Northern Ireland were erupting, making the political symbolism of a Northern Irishwoman representing the Republic. Following her victory Dana returned to Derry and sang her victorious song to a crowd of cheering wellwishers from a balcony in the city."
Oh, to have video of that latter performance.