Hundreds walk out of Whitney Houston concert

LONDON People.com reports Houston failed to hit the high notes when she performed her hit song, "I Will Always Love You," in London on Sunday.

The 46-year-old apparently knew she was disappointing the crowd and tried to reassure the audience, saying "I want to do it, but my voice just doesn't want to."

Houston also blamed the venue's air conditioning for her vocal troubles.

The singer had to pause to catch her breath during some songs.