Lima is the capital and biggest city in Peru and for this, there is always something going on. Lima hosts concerts all the time and I have been able to attend a few. All of the big name preformers put Lima on their tours and for this, Lima's hosted Aerosmith, Ricky Martin, Britney Spears, Rod Stewart, Daddy Yankee and others. The bigger names perform in the National Stadium, which is brand new.
In September I went to the Red Hot Chili Peppers concert in the National Stadium in Lima with a group of good friends and it was a blast! It was funny to listen to the crowd singing along to the songs in English while in Peru. We got to the stadium early to try to get good seat and while waiting there for the show to start, the favorite activity from the crowd during the concert was doing the wave. It seriously went 30 times around the stadium (not kidding) before that got old to the crowd.
Lesser known bands come all the time as well, and these concerts are usually free to attend around Lima. I went to a concert in the Plaza del Gobierno in downtown Lima last month and it was one of my favorite events. There were crowds of people gathered to listen to the bands and dance with the music. It was a very fun experience.