Testamento literally means "will" or "testament," the legal document for your belongings after death. It's a very dramatic and unusual word to find in a pop song!
Becky G uses it metaphorically to express the depth of her heartbreak. She sings, "El día que terminamos firmé mi testamento" (The day we broke up, I signed my will), to show that the breakup felt like a death and that her heart is now "muerto en vida" (dead while alive).
“BESÁNDOTE” is a bittersweet love letter sung by Becky G and Oscar Ortiz. The duo look back on a relationship that almost made it, replaying every memory and wishing they could rewind time. Their hearts feel “dead while alive,” yet the love refuses to fade. They imagine hugging tighter, holding on longer, and—above all—continuing to kiss the person they lost.
Despite the breakup, they promise an endless devotion: even if “more than ten thousand years” pass, the feeling will still be there. The song is a reminder to treasure every moment with someone you love, because you never know when a last kiss might truly be the last.