Her career is having a moment - again

The budding pop star (who dropped out of Berklee to promote “Medicore’’) with the earnest following back home is back on the grind as an opening act, touring the US as the appetizer in a three-act bill, limited to a half-hour set before ceding the stage to Danish singer Oh Land and the headliner, Sia.

The tour visits Boston’s House of Blues this evening. The other night at Webster Hall in New York, Sariñana made the most of her assignment, winning over the room with a mix of songs in Spanish from “Mediocre’’ and new songs from her English-language debut, which is simply titled “Ximena Sariñana’’ and is set for release Tuesday.

Bopping about behind keyboard and laptop, assisted only by her brother Sebastian on another keyboard, she chatted with the crowd- she is bilingual - and talked about each song, exuding genuine simplicity even as she delivered songs that, beneath attractive pop hooks, are harmonically complex and refreshingly varied in spirit - from electro-nerd to pensive singer-songwriter to cosmopolitan chanteuse.

Earlier that day, feet up on a sofa in her record label’s offices, wearing the same straightforward outfit she would sport later onstage, with a blue skirt, simple red top and a pair of Toms, Sariñana said she didn’t experience being the opener as a demotion.

“My role is to keep it short, simple and be the first one of three,’’ she said. “It’s good, it’s fun because you get to meet people; you have to look at it that way. Everybody has to start somewhere.’’

And her new album is in many ways a start. It’s all in English, except the dreamy ballad “Tú y Yo,’’ produced by her friend, singer Natalia Lafourcade. It was made in Los Angeles with top industry talent and is aimed at the US market.

It’s a change from “Mediocre’’ in other ways too. Sariñana’s voice sounds more assured here and less tempted by ornamentation. And from the jaunty whistling line that opens the first track, “Different,’’ the new record is a much more lively affair.