Christina Aguilera is the Master Class

Christina Aguilera is now Professor Xtina as she has finally gone into the class room to give one on one vocal lessons as we reported to you in September of last year.

Christina Aguilera is sharing her voice with the whole class. The MasterClass, that is.

The Grammy-winning singer's latest project — an online education tutorial for aspiring singers — is available for pre-order on the MasterClass platform, a home for expert education classes from the likes of Dustin Hoffman, Kevin Spacey, Serena Williams, James Patterson, Usher and more.

The company announced the news Tuesday, along with news that the platform has secured $15 million in Series B funding, led by New Enterprise Associates, as well as a previously undisclosed $4.5 million Series A led by Javelin Venture Partners and two seed rounds totaling $1.9 million led by Harrison Metal.

According to the company, the funding will be used to expand instructor base and for general business growth. NEA's Rick Yang will join the board of directors. Also included on the investor list is Bloomberg Beta, Novel TMT Ventures, Advancit Capital, WME Ventures, Downey Ventures, Usher, Yan-David Erlich and Matthew Rutler. Rutler is Aguilera's fiance and the founder of MX Investments. He also serves as executive vp of talent and business development at MasterClass in addition to being a key investor.

As part of her new gig as an instructor with MasterClass, Aguilera is offering a special technology treat — "Christina Aguilera's Vocal Range Finder," which will allow students to examine their vocal range. The Hollywood Reporter talked to Aguilera about why she got involved and whose MasterClass she would sign up for.

Why did you decide to partner with MasterClass?
I met the people involved and I really felt confident that this is such a positive and great thing to do to allow people to have access to. It’s a class or courses being taught by the greats in what they do, in the fields they’ve been successful in. I want to take Kevin’s [Spacey] course, for sure. He has a such an interesting and layered craft. See, you’re getting courses with best of the best in the comfort of wherever you want to learn from — in your own space and on your own time. Allowing yourself the time to explore your passion is amazing. And at a great price. My experience with The Voice has also helped lead me to this place.

Read more over at THR and meet your new vocal coach below!