1. Present simple tense: Used throughout the answer ("Pop concerts are...", "singers and bands often tour...", "tickets can sell out...") to describe general facts and habits, which is appropriate for this type of question.
2. Present participle phrase: "performing in massive stadiums or large venues" is a present participle phrase that adds detail about how the singers and bands tour, making the sentence more complex and descriptive.
3. Idiomatic expressions: Phrases like "sell out in no time" and "a big deal" are natural, conversational ways to express popularity and excitement, which sound very natural in spoken English.
4. Adjective use: Words like "massive," "large," "popular," and "electric" are used to add vivid description and emphasis.