"Kylie" opens with "I Should Be So Lucky", a light dance-pop track that uses a drum machine, keyboards and bass by Stock. It depicts a frustrated young woman who feels unlucky in romance and has been compared to the work of Rick Astley. For the album's version of "The Loco-Motion", the producers re-recorded the backing track from Duffy's demo, featuring railway sound effects and less spontaneous vocals. The slow-tempo "Je ne sais pas pourquoi" and reggae-infused "It's No Secret" contain melodies that are reminiscent of Waterman's earlier work in the 1960s at the Mecca Dance Hall. "It's No Secret" features cascading synth and an "effervescent" melody, whose chorus begins with the line "Our love was a lie". Minogue sings "Got to Be Certain", a lovelorn Hi-NRG track, in an upbeat and carefree way. It was first recorded by fellow PWL artist Mandy Smith for her debut album but abandoned; both versions share the same musical backing.