Falling in love is so hard on the knees -- but falling on stage, that's hard for your head, shoulder and neck.
Aerosmith frontman Steven Tyler was airlifted to the hospital last night after falling from a stage in South Dakota midway through a concert.
The whole thing went down after the soundsystem failed during "Love in an Elevator" ... and Tyler began to dance to keep the crowd entertained.
It's unclear how serious his injuries were, but Tyler was reportedly still livin' it up after going down -- joking with the physician in the helicopter.
On the same day she was supposed to perform in Marseille, Madonna -- dressed in all black and wearing a cross -- visited the technicians who were hospitalized when her concert stage collapsed last week.
The cause of the collapse, which killed two people, is still unknown.
Madonna took a moment during her concert in Italy last night to pay tribute to the two men who died constructing her stage in France earlier in the day.
Madonna cried as she called the loss "tragic" and said she was "devastated to be in any way associated with anyone suffering."
Pop Singer Ashlee Simpson collapsed off-stage yesterday in Tokyo following an MTV Japan performance, and is currently recuperating in a Japanese hospital.
A Simpson publicist has confirmed to TMZ that she did collapse, but that she's recovering well and should be fine. Sources tell TMZ that she was suffering from "exhaustion".
Working hard to dispell rumors that she's more than a lip-syncing performer (following last spring's SNL fiasco), Simpson had reportedly just performed her single "Boyfriend" from her new album, "I Am Me," when she told the crowd that she was not feeling well, and left the stage.
Simpson's appearance on Monday's Radio Music Awards in Las Vegas has been cancelled.