here). The original song "It's Nice To Be In Love Again" was the Irish entry in 1977 Eurovision Song Contest. It was performed by group called The Swarbriggs Plus Two. The Swarbrigg brothers Tommy and Jimmy had already represented Ireland in 1975 contest, but this time they had joined with twö ladies (Nicola Kerr and Alma Carroll). The brothers had also written both of those songs. The 1977 song did very well and placed 3rd. You can see their ESC performance, here.
Here's the pair: