It was a very busy Fourth of July weekend, but one summer blockbuster flopped big time at the box office.

Despicable Me 2 (read our review) comes in at number 1 with $82 million over the weekend and $142 million over the 5-day holiday. By all accounts, Despicable Me 2 is a hit, surpassing the first film’s opening weekend tally of $56 million by a pretty wide margin.

Not only that, the sequel’s 5-day total is the highest for an animated feature in that span. Granted, the film had an extra long holiday weekend in its favor, but that shouldn’t stop the film from finishing with a domestic total between $300 and $400 million.

On the international front, Despicable Me 2 opened with $151 million, taking the number 1 spot in 35 of its 38 new markets. The film is already at $293 million worldwide.

On the opposite end of the success spectrum is The Lone Ranger (read our review), which grossed $29 million over the weekend and finished with a 5-day total of only $48 million. Disney’s big budget (according to some reports, over $250 million) blockbuster was hoping to draw similar numbers to the first Pirates of the Caribbean, but unfortunately poor word of mouth spread way too fast.

Lone Ranger‘s disappointing opening isn’t surprising, though, as a lot of movie fans had already pegged this one as a potential flop. Surprisingly, even the presence of Johnny Depp couldn’t save it.

Coming in at number 3, and not far behind Lone Ranger, is The Heat with $25 million. Now at $86 million, the Sandra Bullock/Melissa McCarthy buddy cop comedy is on its way to becoming the summer’s most successful comedy, and is on pace for similar numbers to last year’s Ted.

Monsters University is the number 4 film this weekend with $19 million. While Disney proper is scrambling to find ways to write-off The Lone Ranger‘s losses, Disney Pixar is basking in another success. The animated sequel has already secured $216 million in domestic box office dollars and $400 million worldwide.

Rounding out the top 5 is World War Z with $18 million. We didn’t expect to be saying this, but Brad Pitt’s zombie outbreak film has grossed an impressive $158 million over 3 weeks. World War Z is also doing extremely well overseas, raking in $366 million worldwide.

In at number 6 is White House Down with $13 million, which brings its domestic total up to $50 million. Lucky for White House Down, The Lone Ranger is drawing most of the attention in the flop conversation. That being said, Sony is likely very disappointed considering the film reportedly cost $150 million to make.

Superman flies into the number 7 spot as Man of Steel grossed $11 million over the weekend. Now at $271 million domestic, Zach Snyder’s reboot has a great shot at reaching $300 million total, but it won’t go too far over that mark. That’s nothing to be ashamed of, though, as Man of Steel has also grossed $586 million worldwide.

Kevin Hart: Let me Explain opened very strong with $10 million on only 876 screens. Including Wednesday and Thursday, the stand-up comedy feature has already grossed $17 million. The Kevin Hart fan base is clearly growing as Let Me Explain has already doubled the final tally of Hart’s 2011 stand-up film, Feel My Pain.

In at number 9 is This is the End with $5 million. Seth Rogen’s post-apocalyptic comedy is now at $85 million, which is almost triple its reported $32 million budget.

And finally, at number 10 is Now You See Me with $2 million, which brings its total up to $110 million.

Outside the top 10: The Way, Way Back opened with $575,000 on only 19 screens for a per-screen average of $30, 263. The coming-of-age comedy from The Descendants writers Jim Rash and Nat Faxon is set to expand next weekend, where it will presumably break into the top 10.

[NOTE: These are only weekend box office estimates – based on Friday and Saturday ticket sales coupled with adjusted expectations for Sunday. Official weekend box office results will be released Monday, June 17th – at which time we’ll update this post with any changes.]

Source: Box Office Mojo