In a sign that classic rock is alive and well, U2, Roger Waters and Bon Jovi had the three highest-earning tours worldwide during the first half of 2011, according to concert-industry magazine Pollstar.

U2 nab the No. 1 spot on the list with a worldwide gross of $164 million, while Roger Waters ($97.9 million) and Bon Jovi ($92.1 million) earn the Nos. 2 and 3 spots, respectively. The three acts beat out the likes of younger artists like Lady Gaga and Usher on the tally.

Other classic rockers on the mid-year Top 50 Worldwide Tours list include Elton John ($44.6 million) at No. 9; the Eagles ($36.1 million) at No. 13; Iron Maiden ($30.2 million) at No. 17; Paul McCartney ($30 million) at No. 18; Eric Clapton ($28.7 million) at No. 19; Rush ($25.5 million) at No. 24; and Ozzy Osbourne ($21.4 million) at No. 30.

Meanwhile, U2 also top Pollstar's list of the highest grossing North American tours of the first half of 2011 with $85.8 million. Bon Jovi, Elton John and the Rod Stewart/Stevie Nicks trek also made the Top 10 of that tally.

Pollstar Top 10 Worldwide Tours (1/1/11-6/30/11):

1. U2 ($164 million)
2. Roger Waters ($97.9 million)
3. Bon Jovi ($92.1 million)
4. Lady Gaga ($65.3 million)
5. Usher ($62.2 million)
6. Kylie Minogue ($52.1 million)
7. Kenny Chesney ($46.7 million)
8. Andre Rieu ($46 million)
9. Elton John ($44.6 million)
10. Taylor Swift ($42.9 million)