Popularity is really important in order to bring up the brand. There have a lot of brand who use artist as their brand ambassador. The question is, does it really help? Sometime, I saw there have unrelated ads used by marketers. Such as sportsman become the ambassador of stationary.
I did not denied that it is good to use artist or someone who are popular as brand ambassador but it will be great if it is related. For example a celebrity chef become the brand ambassador for cooking oil or smart students who receive good result in SPM be the ambassador for stationary product.
Recently, I saw a latest news about the Taiwan’s Top ads Kings and Queens. Check out:

Jolin Tsai (蔡依林) has finally beat ex-lover Jay Chou (周杰倫) by topping the 2011 product endorsement chart among Taiwan celebrities.
The 31-year-old singer made NT$460 million ($15 million) alone from shooting 21 TV commercials.
Jay ranked second with 10 commercials, that earned him NT$380 million.
Show Luo’s (羅志祥) popularity is surging across the Taiwan Strait. He closely followed Jay in third place by pocketing NT$350 million, with 15 commercials.
Actress Shu Qi (舒淇) ranked fourth with NT$270 million from 15 commercials.
Her rumored lover Wang Lee-hom (王力宏) ranked fifth with NT$250 million from 15 commercials.
Takeshi Kaneshiro (金城武) ranked sixth with NT$150 million from six commercials.
Rainie Yang (楊丞琳) ranked seventh with NT$130 million from 14 commercials.
Elva Hsiao (蕭亞軒) ranked the eighth with NT$120 million from six commercials.
Vivian Hsu (徐若瑄) was the ninth with NT$100 million from 12 commercials.
Pregnant hot mom Dee Hsu (徐熙娣) was 10th with NT$74 million from 15 commercials.