It may be due to my military background, but I think it's disrespectful to the sing the National Anthem any way other than how it's written. It annoys me when singers think it's their chance to showcase their talent and do some fancy version. Don't add notes or syllables or try to drag it out. Just sing it as written. I didn't particularly care for that Coke commercial. It didn't make me want to boycott products or freak out on the internet, but I did think it was disrespectful. Again, just sing it as written.