Dive summary: 

• Ad Age's data center has compiled a list of the top 10 fastest growing ad spenders in the U.S. for 2012.
• Samsung Electronics tops this years list with a 58% increase in ad spend from 2011 to 2012; the push in spending due to its mobile competition with Apple. 
• The entire study ranked the top 100 spenders; 31 of the 100 increase ad spending by the double digits in 2012. 

The top 10 fastest growing ad spenders, along with money spent and percentage growth from 2011, are:

1. Samsung -- $881 million -- 58%
2. Amazon -- $1.1 billion -- 47%
3. IAC -- $547 million -- 43%
4. Lions Gate -- $418 million -- 43%
5. AbbVie -- $481 million -- 41%
6. Discover -- $603 million -- 30%
7. Dish Network -- $469 million -- 29%
8. Honda -- $1.2 billion -- 29%
9. Kia -- $637 million -- 27%
10. T-Mobile US -- $1.1 billion -- 27%

From the article: 

"The nation's 100 largest advertisers increased 2012 ad spending by a meager 2.8% as they grappled with a slow-growth economy."