While old is gold, there's nothing more exciting than a new model. Take the case of advertisements. Advertisers keep shuffling stars, picking the current flavour of the season.

The latest to get replaced was Katrina Kaif, when she made space for Sonakshi Sinha -- flying high on her Dabangg success -- for the soap, Dyna.

Both actresses added their own touch to the ads, and looked swell. But who did it better?

We take a look at the recent celebrity ads, and compare the new and old brand ambassadors associated with it. Watch the ads, and vote for the star who sells is best!

Watch Katrina's ad here

Ash's reign as the face of L'Oreal may not be over yet but she is facing stiff competition from Slumdog Millionaire star Freida Pinto.

The model-turned-actress has been representing the brand since 2005, while Pinto joined in 2009.

Only time will tell if Freida could become the only face of L'Oreal.

Watch Ash's ad here

Chitrangada and Shah Rukh Khan or Madhavan and Vidya? Tough!

While the former looked quite alright, the pairing of Madhavan and Vidya truly rocked.

Don't believe us? Check out their awesome chemistry in this ad.

We know who we're voting for. Do you?

How can we choose between the Khiladi and the Bigg Boss?

Both have got the attitude down pat, though when it comes to action, Akshay takes the cake.

Watch Salman's ad here

It's not fair to compare a superstar to a rising star but we'll give it a shot, anyway.

So SRK has loads of energy and charisma which he brings to his work. Ranbir has youth on his side.

Then there is the comic timing, which both have in abundance. What else? Oh, wait, what about the ads themselves? Both were very well done.

Watch SRK's ad here

Who do you prefer: a vivacious, bubbly and very attractive Genelia or a husky-voiced smiling Rani?

Watch Rani's ad here

If the whole virginal and untouched beauty sort of thing is your cup of tea, then Katrina in white more than fits the bill.

For those who prefer dark sensuality, Ash in black is just what the doctor ordered.

Either way, the women have definitely earned their diamonds.

Watch Ash's ad here

It's a matter of the sultry pout versus the famous dimples. It helps that they can actually ride a scooty.

So who is it going to be?

Watch Preity's ad here

One looks like a Greek god while the other is the god of acting. But where Aamir really scores is in his ability to look like another man!

Not much of a contest, this one.

Watch Hrithik's ad here

Both ads are kitschy and filmi to the core. But are they entertaining or just plain annoying? You decide.

Watch Govinda's ad here