Eva Longoria (the sexiest 38-year-old woman on Earth) is now officially single.

Sources tell TMZ, the former "Desperate Housewives" star split from boyfriend Ernesto Arguello this week after dating for roughly 4 months.

The two met while Longoria was producing her dating show "Ready for Love." Ernesto was a bachelor on the program, but after the show went off the air, Eva decided to take Ernesto for herself.

Eva and Ernesto were spotted canoodling in Spain as recently as two weeks ago (above), but once they got back to L.A., we're told they decided their busy lifestyles just didn't mesh.

Eva spends most of her time in L.A., and Ernesto is situated primarily in Miami, so they decided it would be better to split. But some sources aren't convinced it's completely over -- as one source put it, "They're just on hold right now."