DeGeneres never mentioned Samsung, a major Academy Awards sponsor, but handed actor Bradley Cooper the company's Galaxy Note 3 for the celebrity-filled shot that included Meryl Streep, Jennifer Lawrence, Kevin Spacey, Jared Leto and Lupita Nyong'o.
The Oscars selfie was such a viral hit that it crushed the previous record set by President Obama after his reelection in 2012 and temporarily knocked Twitter's service offline as fans retweeted it more than 700,000 times in the first half hour alone.
"We crashed and broke Twitter," DeGeneres said from the stage. "We made history."
The selfie holds the record as the most popular tweet ever, making the picture worth every dollar Samsung paid for the sponsorship, said Peter Sealey, chief executive of the Sausalito Group strategic marketing company.
"That was a social media home run. It really was," Sealey said.
Samsung said Monday that the selfie was not scripted and that it would donate $3 million total to two charities picked by DeGeneres to thank her. It also began running an ad on Twitter: "Record-breaking selfie taken on #TheNextBigThing! Noted."
The South Korean electronics maker used the Oscars to introduce its "One Samsung" campaign that promoted a variety of products including the Galaxy Note Pro Tablet, the Galaxy S5 phone, the Gear 2 smartwatch and a curved ultra-high-definition television.
Samsung did not disclose how much it paid to be a sponsor, but according to research firm Kantar Media, the company spent $24 million from 2009 to 2013 to be one of the top advertisers on the show during those years.
Samsung's Note 3 phone was a fixture on Sunday's broadcast. On Monday, DeGeneres tweeted that she gave everyone in the audience of her namesake TV show a Galaxy Note 3.
Product placement is the practice of paying to have merchandise featured in a scene. It has become a multibillion-dollar business as more viewers skip commercials, making product placement an effective and less intrusive way to get brands in front of people.
James Bond carried the Sony Xperia T smartphone throughout "Skyfall." On Showtime's "Homeland," CIA agents were contacted in the field over Skype. Cisco's videoconferencing tool TelePresence made a cameo in "30 Rock" when Jack Donaghy was forced to use it after getting bed bugs. In an episode of "Hawaii Five-0" a character is told to "Bing it" as Microsoft tries to get people to use "Bing" as a verb the way they use "Google."
Facebook got tons of free publicity with the award-winning 2010 film "The Social Network" which was an unauthorized look at the company.
The biggest role in a movie yet for a technology company: Google in last summer's comedy "The Internship." The Internet giant's campus in Mountain View, Calif., was the setting for the film in which Vince Vaughn and Owen Wilson play down-on-their-luck watch salesmen searching for a second chance as Silicon Valley interns. Google lent its brand to the 20th Century Fox movie and let the production film two days on site without charging location or licensing fees.
But for years, one Silicon Valley has been most famous for getting free screen time, and that's Apple.
Starting in the 1990s, the Macintosh began appearing on "Seinfeld" and in "Independence Day."
With new devices such as the iPod and iPhone swiftly gaining popularity, producers started to clamor to get those devices onto television and into movies. Carrie Bradshaw used a MacBook on "Sex and the City," and Michael Scott was given an iPhone on "The Office."
Apple products showed up in more than one-third of films that topped the U.S. box office between 2001 and 2011, according to a study from Brand Channel.
According to testimony in 2012 from Phil Schiller, Apple's global chief of marketing, in its patent lawsuit with Samsung, Apple does not pay for its products to be used by Hollywood stars in movies and television. But it does provide the gadgets free of charge.
That was the case in a dramatic product placement in the first season of Netflix's "House of Cards." In one scene, there were no fewer than nine Apple devices (five iPhones and four iPads) as Spacey's character Frank Underwood and an aide monitor multiple police radio feeds.