On Monday Newsnight broadcast what it called an excerpt from the opera, Die Fledermaus to pay tribute to Australian soprano Dame Joan Sutherland.

Then on Tuesday Jeremy Paxman apologised because the piece was actually from the opera, La Traviata.

Lots of viewers then pointed out there is a convention in Die Fledermaus that singers perform a piece from another opera and Jeremy had to apologise again on Wednesday.

Watch how it unfolded.