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After the GOP front-runner made his announcement, rival Ted Cruz challenged him to a one-on-one showdown.

Voters took to Twitter as candidates Hillary Clinton, Bernie Sanders and Martin O’Malley squared off Monday in Des Moines, Iowa. 

The Sun reported Sunday that a fashion stylist stayed at Harry Styles’ house overnight, sparking cheating rumors.

Organizers claimed 1 million people turned out in the Chechen capital to proclaim their loyalty to President Vladimir Putin and regional strongman Ramzan Kadyrov.

Twitter stock is trading at historic lows the day after a six-hour service outage annoyed users and rattled Wall Street.

The chain of fast-food chicken restaurants outperformed other American brands across all major social network platforms as the favorite brand of 2015.

Hours after an interruption began Wednesday, many users of the Microsoft game system — including rapper Snoop Dogg — were still experiencing problems.

Italian police are investigating the killing of Ashley Ann Olsen, 35, who was found dead in her apartment Saturday.

The front-runner in the race for the Republican presidential nomination tweeted a link to a recent obituary, saying, “Thank you so much. [Ernest] must have been a great person.”

Justin Bieber reportedly still loves the relationship he had with Selena Gomez.

Marketing execs, including the social networking site's Carolyn Everson, explained Wednesday how they'll try new ways to reach consumers online.

The feud began after the actor said in a recent interview that he is better than Donald Trump at golf as he doesn't cheat.

A cyberattack from Turkey hit Russia’s communications minister as experts say the Turkish economy stands to lose $10 billion as sanctions continue.

Thanks to one enterprising artist, everyone can get a glimpse of "Hamilton" -- even if they can't go to see it.

A researcher who uncovered a big Instagram security flaw claims Facebook threatened him to keep quiet, but the social network denies doing so.

The social network will soon require users to download an app called Moments if they want to use automatic photo sync.

Anonymous-messaging app Whisper has gained attention among young users and, recently, big-name advertisers.

The hacktivist group has begun its "day of rage" campaign against the Islamic State group by posting mocking images on Twitter, Instagram and Facebook.

The hacktivist group launched Operation Trump earlier this week and attempted to take down one of the Republican front-runner's websites.

"I'm at a loss for words, but I know [you] are in a better place and finally at peace."

The disappearing-message app outranked Facebook and Instagram as adding the most users this year in a poll released Thursday.

Justin Bieber posted a photo on Instagram of a mysterious girl and asked fans to tell him who she was.

Victoria Beckham unleashes her funny side in her new Instagram pictures.

The hacktivists will use Twitter, Facebook, YouTube and Instagram to troll Islamic State and attempt to disrupt their online activity.

The man allegedly first attempted to rob a bank and then fled into a barber shop when police came.

America's largest Spanish broadcaster filed its formal reply to the Republican presidential candidate's lawsuit, asking the court to dismiss the case.

Harper Beckham turns model for her designer mom.

North West enjoys a play date with the daughter of her mom's friend.

An album many expected to come out weeks ago still hasn't dropped, potentially gumming up a complicated marketing campaign.