Its Portuguese version "Ser Ou Parecer" was released two days later, on 20 September, also as the lead single for the Brazilian market.

The song narrates a classic story of unrequited love; it is sung from the point of view of a girl who has fallen for a guy that never pays any attention to her.

The lyrics of the song describe the girl's unsuccessful attempts to catch the guy's attention and "despertar el interés vacío", or "awaken the empty interest".

In the United States, "Ser o Parecer" debuted and peaked at position number 84 on the Billboard Hot 100 on the week ending December 16, 2006.

[7][8][9][10] "Ser o Parecer" stayed within the top-ten positions of the chart for fifteen consecutive weeks, from October 2006 to February 2007.