LOS ANGELES, June 10 - Following are the top 10 movies at North American box offices for the weekend starting June 15, led by "Madagascar 3" at No. 1 for the second straight week with $35.5 million, a c cording to studio estimates compiled by Reuters. 1 (1) Madagascar 3: Europe's Most Wanted .......$ 35.5 million 2 (2) Prometheus ...............................$ 20.2 million 3 (*) Rock of Ages .............................$ 15.1 million