One hot mama!

MICHAEL Bublé has one hot mama on his hands as wife Luisana Lopilato rocks a sexy photoshoot while four months pregnant.

When most mums-to-be would have their heads down the toilet, the Argentine star poses in lacy black underwear for British brand Ultimo.

Wearing a black floral-patterned sheer bra and matching knickers, the model, 25, lies seductively on a hotel bed in New York.

The tanned beauty wore loose curls in her long blonde hair with smouldering dark eye makeup.