The 'Rocket Man' singer spent two nights in intensive care after becoming "violently ill".
The 'Cheek to Cheek' collaborators perform the classic jazz track in Brussels
Tony Bennett and his 'Cheek to Cheek' partner Lady Gaga released a video last night of their breathtaking rendition of 'But Beautiful', live from Brussels.
The two US singers teamed up for the jazz performance in Belgium to celebrate the release of their collaborative album, which hit the number one spot on the Billboard album charts this week.
The 88-year-old music legend and eccentric pop queen covered a collection of classic tunes from the Great American Songbook for their latest works including 'Anything Goes', 'It Don't Mean A Thing (If It Ain't Got That Swing)', 'Sophisticated Lady' and 'Lush Life'.
With the recent success of their partnership, Bennett has managed to beat his own record of being the oldest artist ever to release a number 1 album.
To see their electrifying duet, watch the video below...