noun
a large, outstanding, or unusual event, thing, or person; a person or thing that is particularly impressive or attractive
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The annual music festival known as Lollapalooza attracts thousands of attendees each year.
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Are you going to Lollapalooza this summer? It's going to be epic!
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Lollapalooza is the ultimate music fest, you don't want to miss it!
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The project was a lollapalooza of success, exceeding all expectations.