By Alistair Barr and Tanya Agrawal (Reuters) - ChannelAdvisor Corp shares soared more than 40 percent in their market debut on Thursday as investors bet the e-commerce software company will benefit from the rapid global spread of online buying and selling. The company's shares opened up 25 percent, after its initial public offering of 5.8 million shares was priced at $14 per share, the high end of its pricing range.

Yahoo! pressed on with its shopping spree on Thursday with the acquisition of a startup that powers games played on smartphones, tablets, consoles or personal computers. Word that Yahoo! has bought Northern California-based PlayerScale came three days after the aging Internet pioneer announced a $1.1 billion deal to buy hip blogging service Tumblr as part of a move to woo a younger online audience. "Today we acquired PlayerScale," Yahoo! said in a statement emailed to AFP.

According to reports, the crowd at Cannes has been fooled by a man posing as Korean artist Psy, who has been using his falsely acquired celebrity status to live it up on the Croisette.  Numerous party goers were apparently taken in by the impersonator with many sharing news and images of their meeting with the artist behind "Gangnam Style" on Twitter.

On Thursday, May 23, Google+ users are buzzing about Twitter's plan for two-step authentication and Chevy's new electric car, the Chevy Spark.  Following a series of high-profile hacks, the microblogging site Twitter is taking steps to ensure the security of its users with the introduction of a two-step authentication system. Two-step or two-factor authentication works by sending a unique, one-time log-in code by text message to the phone linked to the Twitter user's account, making it much harder for a hacker to gain access to an account.