Bosses at record label Sony have issued an apology to Whitney Houston fans for "mistakenly" bumping up the price of her albums since her death on Saturday.

Following news of the tragedy, the wholesale cost of two of the singer's records - The Ultimate Collection and Greatest Hits - went up by around $4.80 each, causing an automatic price rise on iTunes.

The price hike caused outrage among fans, who took to social networking websites to slam record executives for being "greedy" and brand the move "shameful."

Now Sony heads have issued a statement insisting the albums were "mistakenly mispriced" and they "immediately corrected" the error once it had been discovered.

Sales of Houston's songs and albums have received a major boost in both the U.S. and U.K. since her passing.