What’s Opera, Doc? the great Warner Brothers cartoon with Bugs Bunny, came to mind as my sister was telling me about the crowds beginning to pour into the park at 5:30.

The show starts at 8 p.m. and the police are expecting a great many people. Diaper Diva took this picture of a police tower with her iPhone. Well, they’re saying that it may be the Metropolitan Opera’s largest outdoor concerts in company history.

Here are the ‘tails:

Two of opera’s biggest stars, soprano Angela Gheorghiu and tenor Roberto Alagna, will perform together on the Long Meadow Ballfields on June 20 at 8 p.m., together with the Metropolitan Opera Orchestra and Chorus. This year’s Prospect Park concert is anticipated to be one of the Metropolitan Opera’s largest outdoor concerts in company history.

The performance will be broadcast live on WQXR-FM (96.3 FM), and streamed live on the Met’s website, www.metopera.org.

The married star couple of Gheorghiu and Alagna will sing popular arias and duets by Verdi, Puccini, Donizetti, Massenet, and others, conducted by Ion Marin. Gheorghiu and Alagna will perform on a larger-than-normal stage, surrounded by six jumbo video screens that will be strategically placed throughout the area to maximize the viewing experience.

The concert begins at 8 p.m.; the rain date is scheduled for Saturday, June 21, also at 8 p.m. For more information on Met Summer Concert: Live in Prospect Park please call (212) 362-6000 or visit www.metopera.org/park.