The purchase price is secret, but Harry and Stein say in a comment that they are "happy to work with a progressive company".

Hipgnosis Songs Fund is a fund where investors make money on music royalties. The future income for the Blondie hits will now go to the fund started by the music industry veteran Merck Mercuriadis.

He believes that you can just as well invest in songs as in oil or gold. The fund manages the songs with the aim of getting the maximum dividend when they are used in, for example, commercials or video games.

- We do not speculate in new songs. We buy proven hits that have predictable and reliable revenues, Mercuriadis has explained.

Earlier this week, the fund announced that it had bought the rights to over 900 Barry Manilow songs.