He worked with people who were at the top of many music genres. Body and Soul with Amy Winehouse. Blue Velvet with k.d. lang. On the Sunny Side of the Street with Willie Nelson. New York, New York with Andrea Bocelli (though it would have been more interesting if they'd sung some of those classic Italian ballads that Bennett grew up singing). I've Got You Under My Skin with Lady Gaga.

Tony Bennett duets results on Google. It can be a deep dive, wending through these results.