Pop star Beyonce faced a social-media backlash from fans on Monday after an anticlimactic announcement on "Good Morning America."

Fans teased by a "GMA" tweet the day before -- "Beyonce has something amazing she wants you to know: This is something I have to share with everyone . . . ' " -- had expected news of a new album or of a second pregnancy. Instead, they saw a pre-taped message in which the singer, 33, appeared to be promoting her vegan meal-delivery service, without mentioning it by name.

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"This is something I have to share with everyone," the multiple Grammy Award-winner said on the message. "I am not naturally the thinnest woman. I have curves. I'm proud of my curves and I have struggled since a young age with diets and finding something that actually works, actually keeps the weight off, has been difficult for me."

The "GMA" segment said this was in reference to the service she and her trainer, Marco Borges, announced in February, based on his vegan-diet book "The 22-Day Revolution."

"I just wanna say I set my alarm for 6:55 to hear Beyonce talk about a diet. I am not happy," wrote one fan on Twitter. "Wake up at 7 she says. I have an announcement she says. I'm vegan she says," wrote another. One meat-lover tweeted, "Still mad that I woke up early and subjected myself to 'GMA' just to hear Beyonce say she doesn't enjoy life anymore." Others in social media posted harsher comments. One felt insulted that, "Beyonce gonna show ppl how to sustain a diet normal ppl can't even afford."