However, there are some songs featured in the movie that are very popular and might be what you're thinking of! Perhaps you're thinking of:
* "Viva la Vida" by Coldplay - This song is featured in the film's trailer and plays during a montage of the chihuahua's adventures.
* "The Best Day of My Life" by American Authors - This upbeat track plays in the background during several scenes, especially the more lighthearted moments.
If you can remember any other details about the song (like the genre or a specific lyric), I might be able to help you pinpoint the exact song you're looking for!