Teens have a new favorite restaurant: Chick-fil-A.

The fried-chicken chain has stolen the top spot from Starbucks in the latest Piper Jaffray survey on teen spending.

That's a huge upset. Starbucks has won the No. 1 spot among teens in almost every semi-annual Piper Jaffray survey for the last seven years.

Starbucks is now in second place, followed by Chipotle, Buffalo Wild Wings, and Panera.

Chick-fil-A's rise could have something to do with Starbucks' recent troubles with long lines and delays from bottlenecks of mobile orders.

The coffee chain recently reported that traffic fell 2% in the most recent quarter, and attributed the decline to issues with mobile orders.

Here are some of the other key findings from the Piper Jaffray report on teen spending:

1. Teens are spending most of their money on food. Over the last several years, teens have been spending a greater share of their money on food, and less on clothing.

Food now accounts for 24% of teen spending, followed by clothing (19%), cars (9%), accessories and cosmetics (9%), shoes (8%), video games (8%), and electronics (7%), according to the survey. The rest is spent on music, movie, and events.

Here's how teen spending between food and clothing has changed over the years.

2. Teens’ favorite website is Amazon, with 43% share of the market, compared to the No. 2 website, Nike, with 5% of the market.

3. Nike remains the top clothing brand among teens across all income levels. American Eagle, Forever 21, Lululemon, Adidas, and H&M also rank among the most popular apparel brands. Top footwear brands include Nike, Vans, Adidas, Converse, and Steve Madden.

4. Under Armour and Aeropostale are losing ground among teen customers. They rank No. 1 on the list of brands teens say they no longer wear. Gap, Justice, Hollister, and Adidas also appear on that list.

5. Adidas, however, is rapidly rising and gaining share among teens. It held the No. 10 spot on the "favorite clothing brands" survey last year. This year, it's tied for the No. 5 spot. It also moved up one spot to No. 3 on the list of teens' favorite footwear brands.

6. Patagonia has also had a sudden rise in popularity and for the first time ranked among teens' top five athletic apparel brands.

7. Teens' favorite social media platform is Snapchat.

8. Teens are spending much more time watching Netflix than cable TV.

9. An increasing number of teens prefer to shop online over department stores.