and here's becky worley to tell us. >> reporter: clipping coupons is much apart of shopping as making a grocery list, is enjoying a revolution. and laura sullivan is taking full advantage. >> my best deals were 50% off of a day-long trip of kayaking. certain percentage off a champagne cruise around the bay. >> reporter: laura is a zen master of the online deal. using sites like groupon and living social, which offer online discounts she can redeem in the real world. >> never had ever been on a sailboat before and 50% off of a fairly expensive class made it worth it. what are you waiting for? might as well do it. >> reporter: last year, 23 million americans, 10% of the adult population, found a deal on one of these sites. groupon offers everything from the ordinary to the exotic. zip-lining in santa cruz. sky diving in detroit. chemical peels in philadelphia. and dancing in dallas. but now, the online giant facebook is trying to get into the game. testing the waters in five cities. connecting users with businesses eager to get their discounts discovered. taste better at a discount? >>

. >>> also, becky worley is on the job again. all these products with big promises. so she's going to put the tide pen to the test. does it really work? becky will find out. >>> and reese witherspoon will be here. talking about her biggest costar yet. the movie just opened last night in new york. she'll be here in a little bit. >> huge costar, gigantic coming up. >>> this weekend, a tough one for nicolas cage. the oscar-winner down in new orleans. not so easy in the big easy for him. a very dramatic scene on the streets of the french quarter. andrea canning upstairs has the details. >> reporter: good morning, robin. nicolas cage is in new orleans filming an action thriller. during time off, he was arrested on domestic abuse and disturbing the peace charges. police say he was heavily intoxicated and violent, striking cars and allegedly pushing his wife in a heated argument over a rental property. maybe he didn't like the lighting. he can be seen closing his eyes in this unbecoming mug shot. >> he taunted the police. he said, go ahead, arrest me. they tried to send him

our tech contributor, becky worley, is joining us from oakland, california, to tell us more. good morning, becky. >> good morning, dan and bianna. yeah. it's estimated over 40 million americans own either an iphone or an android device. so, now, news that these phones are learning a little bit more than we thought about where we go and when we go. you take your phone with you everywhere. so, when security researchers discovered that apple iphones are logging location data, cries for privacy rang out. and now, news that google's android phones are also logging your movements. >> they collect your location information, which is your latitude and longitude, coupled with a unique device identifier. that's being sent back to google on a regular basis. >> reporter: this data could build a rich databases that help google and apple improve technology. >> iphone can be an itracker. and an itracker can be used by a predator. >> reporter: i downloaded a program on my computer that takes all of the location data apple is storing on my phone and then shows it on a map. with the phone in m

becky worley, abc news, san francisco. >> they have their fingers in everything, really, facebook. >> it's amazing the power of facebook. in case you're wondering what those five test markets are, san diego, san francisco, dallas, austin and atlanta. though so those are the five. if you live in those cities, check it out. >> and also people saved a billion dollars by saving coupons last year and it's groupons. >> i've heard people say it both ways. >> apparently the proper way to say it, but it saves you a lot of cash. >>> when we come back this morning, what might be the worst place on earth, literally, to work. >> yeah, we really mean this. a startling look at what it is like to live and work on top of a burning coal mine. you don't want to miss this story. you're watching "world news now." story. you're watching "world news now." ss this story. you're watching "world news now." >>> if youa >>> well, if you're a viewer >>> well, if you're a viewer of reality shows, "the deadliest catch," a pretty popular show you may think the conditions that those guys work in are pretty tough and

. >>> first, here's becky worley on more on why so many people are spending time doing this, like sam. >> reporter: conan o'brien loves it. justin bieber adores it. even the british prime minister is addicted. angry birds is everywhere. from re-enactments online to spoofing a dictator. in 2010 alone, it was downloaded over 50 million times. playing is simple. use a slingshot to fling your boards toward the pig. the evil swine hide in fortresses. they get stronger as you progress. it was designed to be played while you kill time. in three-minute increments. but it's addictive. i'm ashamed to say, i've played over 20 hours of angry birds. it's like you get sucked into the game. i'm coming to get you, pigs. so, while you guys are finishing the show, i'm just going to clear another level. ah! >> did you see becky? okay. our big announcement for angry bird lovers everywhere, we have a special golden egg for you, just in time for easter. hit like on our "gma" facebook page to see the clues that will help you unlock a brand-new level in angry birds. >> brand-new version. on facebook. >> a wh