What does Demi Lovato mean by this twitter update?

[hugeflavor378]

ddlovato: Tonight's show honestly could've been straight out of Spinal Tap. Haha... priceless.


is that a good thing or bad thing?
what does she mean?
? please answer someone!

[Sam]

well last night she really messed up at the concert first when she came out for la la land the mic didnt work she didnt notice till have the song was done so she kept going when the song was finished she said i guess lets do this song again and she said haha i just cant pop up from the stage then during one of her new songs catch she messed up like a line or two after the song was done she said something bout it and another new song she messed up a line in cant stop the world she forgot what came next and mumbled a little for like two seconds "i dont know how i dont know how" she forgot those lines then during the aretha franklin song natural women she totally kept messing up the piano part and kept starting over then stopped and was just like im a normal person she was laughing like at herself and stuff saying she makes mistakes and how she keeps messing up spinal tap was some sort of band that did this pilot for a comedy show or something i looked that up so she was basically saying that her show last nigth was one big failure after another and it was really hilarious she was laughing alot i went last night and i have been to two others of hers this week even though she messed up alot it was by far the best one yet not going to lie but basically she just twittered that saying it was like the spinal tap comedy show