Whitney Houston, who is currently on tour in Australia where she has been WOWing the crowd (well, not all of the crowds) on her Nothing But Love World Tour, took some time during her concert stop in Adelaide, Australia to wish her daughter a Happy Birthday on the concert stage. Bobbi Kristina was brought on stage where she was surprised with a birthday cake and a serenade from her fabulous mother:

Whitney Houston added two new songs to her set during her concert Wednesday in Adelaide, Australia. Halfway through the show, during the “unplugged” portion when Houston, 46, performs old hits, she announced it was her daughter Bobbi Kristina’s 17th birthday, a source close to the singer tells PEOPLE. Houston then sang “Who Would Imagine a King” from The Preacher’s Wife. “[It's] one of Krissy’s favorites,” the source says, “and is not in the show.” Then a birthday cake was rolled out on stage, and Houston invited her daughter to come up, joined by her dancers and another tune – “Happy Birthday,” which was sung by the entire audience. Mother and daughter also celebrated the occasion in Sydney earlier in the week during a stop on the singer’s Nothing But Love world tour. “They rented a beautiful boat and took a four-hour cruise all around Sydney Harbor with Krissy’s friends, the dancers and family members,” adds the source. “That was the pre-birthday celebration. The cake at the concert was a complete surprise to Krissy. She had no idea!”

How sweet! Now this is one of the perks of having a DIVA as a mother … she can wish you a Happy Birthday unlike anyone else can. It looks like Bobbi Kris had herself a very special, really wonderful 17th birthday … thanks to her loving mother Whitney Houston. Love it!!

UPDATE: Pink reader Marcus sends along video of Whitney Houston singing to her babygirl Bobbi Kris for her birthday, check it out after the jump …