I got confused by "A few bars from such Latin pop songs".
If the writer said "such Latin pop songs from some bars" (bar means a counter at which drinks, esp. alcoholic drinks, and sometimes foods, are served.), it is easy to understand it. How could a bar from a pop song?

Four years later, Evelin's cheeks still dimple when she smiles. But she's often frowning. Her sisters have learned to censor the radio. A few bars from such Latin pop songs as "Te Amo, Mamá" are enough to bring her to tears. And she can only talk about her mother for a few minutes before her voice chokes up.

I surmise "Te Amo, Mamá" is Latin, meaning "To America, Mama". Right?
I need a music expert to help me with the details, Jobb, but these are not drinking bars, they are units of music-- on the sheet music we can see vertical bars which separate measured sections of the song.

And 'te amo, Mama' means 'I love you, Mama' in Spanish.
A few bars from (a song) =
Hearing just a small portion of (a song) OR When she heard only a little of (a song)

A typical song would be about 50 to 60 bars in length, so just a few bars is not much of the song.

Another word for a "bar" in music is "measure".

Play me a few bars of "Deep Purple".

Play me a few measures of "Deep Purple".

Joke formula: -- Do you know how to knit sweaters? -- No. Can you hum me a few bars?

(The response is to Do you know "How to Knit Sweaters"? -- as if "How to Knit Sweaters" were the title of a song.) Emotion: smile
Students: We have free audio pronunciation exercises.
That is so cool.
 CalifJim's reply was promoted to an answer.
Site Hint: Check out our list of pronunciation videos.