The pop legend joined Preston and the boys for a rendition of the Madness classic ‘My Girl’.
Suggs dedicated the song to everyone in the audience who had fainted.
Of the collaboration Preston said: “It was mental!”
The Ordinary Boys are set to play the final March date of their tour tomorrow night (March 26) at Folkestone Lea Cliff Hall.
Their sold out tour continues in April. The dates are:
Brighton Dome (April 21)
Birmingham Academy (22)
Liverpool University (23)
Edinburgh Corn Exchange (25)
Newcastle Academy (26)
Norwich UEA (27)
London Hammersmith Palais (29)
Cardiff Uni Great Hall (30)
Exeter Great Hall (May 1)
Bristol Academy (2)