Cheap$kate: This week's best FREE events in NYC

Cameron, Landau 'Titanic' Q&A and signing
Will your heart go on after meeting James Cameron and Jon Landau - director and producer, respectively, of the 1997 cinematic sensation "Titanic"? Well we certainly hope so, because you have to stay alert for the Q&A and fan signing the two will conduct tonight celebrating the Blu-ray debut of "Titanic." The fan signing, though also FREE, is limited. So if you snag a signed copy, remember to never let go. Sorry, we had to. (Monday, 7-9, lineup begins at 5:30 p.m., FREE, Best Buy Union Square, 52 E. 14th St., 212-466-4789, stores.bestbuy.com/1531)

The All-American Rejects concert
We're not keeping it a dirty little secret that the alt-rock band All-American Rejects will take the stage at the MLB Fan Cave Monday. And best of all, the show is FREE! So swing, swing, swing on over tonight to catch what's sure to be an entertaining evening with the rock quartet, who will likely be playing some tracks from their new album "Kids in the Street." (Monday, 5:30 p.m., FREE, admission is first-come, first-served, MLB Fan Cave, Fourth St. & Broadway, mlbfancave.mlb.com/fancave)

Junot Diaz book signing
Pulitzer Prize-winning author Junot Díaz ("The Brief Wondrous Life of Oscar Wao") turns his attention - and his writer's eye - to the subject of love in his latest story collection, "This Is How You Lose Her." Díaz will be at Barnes & Noble Union Square Tuesday evening reading from his latest endeavor. (Tuesday, 7 p.m., FREE, Barnes & Noble Union Square, 33 E. 17th St., 212-253-0810, bn.com)