The `Bad Romance` singer ordered 80 cheese pizzas for people who were waiting for her autograph outside a Los Angeles store where she was scheduled to do a record signing.
She wrote on her Twitter page: "Sending all my little monsters little pizzas for waiting all night for me at Best Buy. I hope you`re hungry... eat up I love u! (sic)."
As well as splashing out $1,000 on the pizzas, which were provided by fast-food chain Papa John`s, LadyGaga is also said to have tipped "very, very well".
The `LoveGame` singer also thanked her fans for making her latest release, `The Fame Monster`, number one in the US iTunes charts.
She wrote on Twitter: "To all my beautiful fans, I love you more than anything. Thank u 4 making the fame monster number 1 on itunes. You are the only reward I need x gaga (sic)."
LadyGaga`s generosity to her fans was also displayed when she released a set of bizarre gifts which she gave away with a collector`s edition of `The Fame Monster`, which included a lock of her blonde hair, a personal note from the songstress and a jigsaw puzzle.