With Christmas and all the festive dinners being over, people want to get skinny and fit to meet the summer season in their perfect shape. Beverage brands are here to help consumers to reach this goal with their low calorie drinks—yesterday, we announced the new round of Diet Coke’s campaign, and now another diet product comes up: Diet Pepsi is releasing a new spot featuring actress Sofia Vergara, who starred with English soccer legend David Beckham in the previous commercial of the brand last spring. The new advert will debut on the 69th annual Golden Globes awards show on January 15, 2012, and now fans of Diet Pepsi and Modern Family star can watch a teaser of the commercial. Watch the teaser of the new commercial on the brand’s Facebook page.

Dr Pepper, the iconic beverage brand which celebrated the 125th anniversary of its ‘original life’ in 2010, is kicking off a new advertising campaign, which is revolving around authenticity. The U.S. promotion dubbed ‘Always One of a Kind’ includes a commercial, which features nearly a thousand of the brand’s fans, who are living their life in an unconventional way and are happy to have their fresh and bright traits, which make them different from most of other people—the spot, which debuted yesterday, January 9, during the BCS National Championship Game, will be aired in March ABC, CW, FOX, NBC and cable channels.

On the heels of Frito-Lay’s campaign focused on the sources of its products, McDonald’s is going to launch a new promotion in the USA, revolving around the company’s meat and vegetable suppliers, to showcase real people, who help make the fast food chain’s offerings organic. The new push, which includes TV, print and digital, additional paid and earned media, is slated for January 2, and, as AdAge reports, it will be “running sporadically” through the end of 2012.

To spice up the holiday season and remind adult consumers that Christmas is a great time to drink and share Guinness, the popular beer brand launches a festive ‘two colored’ push in the UK. The campaign, which is running under the strapline ‘Celebrate this Christmas with a Guinness’, is built on the idea that this white season the clack colour (which refers to the iconic black pint of Guinness) is a perfect fit for the festive occasion.