13 February 2012 Last updated at 12:42 ET

Whitney Houston album sales surge after singer's death

Houston's hits included I Will Always Love You and I Am Nothing

Sales of Whitney Houston albums have soared on both sides of the Atlantic following her death in Los Angeles.

Whitney - The Greatest Hits is at two on the US iTunes chart, while Whitney Houston - The Ultimate Collection is second in the UK iTunes chart.

Some fans reacted angrily on Twitter after The Ultimate Collection's price was temporarily raised on iTunes UK.

The price was increased from £4.99 to £7.99 but has since reverted to its former cost.

Several fans on Twitter described the alleged price hike as "greedy" and "shameful".

iTunes and Sony Music, Houston's record label, declined to comment on the matter.

Houston also had two other albums in the US iTunes top 20 - her debut, titled Whitney Houston, and the soundtrack to The Bodyguard.

Her second album, Whitney, was number three on the UK iTunes chart.

Houston was found dead in the bath in her Los Angeles hotel room on Saturday. A Los Angeles coroner said there were no signs of foul play.

Ed Winter, LA coroner's officer: "We do not know what caused her death yet"

Officials are not ruling out any causes of death until they have the results of toxicology tests, Ed Winter told reporters.

It could be up to eight weeks before investigators know exactly why the 48-year-old singer died.

Mr Winter said Houston's family are "making arrangements" to have her body returned to them following the completion of the autopsy, adding that "sometimes it takes a couple of days".

Music stars paid tribute to Houston at Sunday's Grammy awards, with host LL Cool J calling her a "fallen sister".

Singer Jennifer Hudson performed Houston's hit I Will Always Love You, the song she topped the charts with in 1992.

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