J. Lo and J. Fo will deliver a ''Monster'' hit | 155817__monsterbop_l
I FOUGHT THE 'LAW'... Coming in at No. 1 will be a Monster job for Fonda, Lopez, and Michael Vartan

With Kingdom of Heaven's disappointing U.S. debut last weekend, it's now up to Jennifer Lopez and Jane Fonda to kick-start the summer box office.

The duo's new comedy, Monster-in-Law, hits theaters this weekend, much to the delight of women and gay men everywhere. The combination of its guilty-pleasure plotline (woman and potential mother-in-law hate each other) and Fonda's return to the big screen should result in an opening of $25 million.

Also premiering this weekend is Will Ferrell's latest silly comedy Kicking & Screaming, in which he plays a crazed soccer dad. Fans of his unique brand of humor will turn up to the tune of $16 million.

Kingdom of Heaven, meanwhile, will see a 45 percent drop to $11 million, followed by the new Jet Li-Morgan Freeman thriller Unleashed with $9 million. Fifth place will go either to House of Wax or the long-delayed Christian Slater action flick Mindhunters, each of which should gross $6 million this weekend. Oh, Star Wars, where are you when we need you?