No, I don't think. She should be in New York on 9th June, and I read somewhere that nobody foreign royals are invited to the christening, it should be a very familiar event...
it's listed that she will attend the second day
"12.06.2014 Official Luncheon
State Visit from Germany Majesties The King and Queen and Their Royal Highnesses The Crown Prince and Crown Princess attends the Government luncheon in honor of HE President Joachim Gauck and Mrs. Daniela Schadt at Akershus Castle (12.00)."
but not on the third day with Haakon
"06/13/2014 MARINTEK / NTNU
State Visit from Germany H.K.H. Crown Prince companion H.E. President Joachim Gauck and Mrs. Daniela Schadt during a visit to MARINTEK / NTNU, Trondheim (11:40)."
added:
it does look like she will be at the gala on the first day
11.06.2014 Gala dinner
State visit from Germany: Their Majesties The King and Queen host a gala dinner in honour of His Excellency President Joachim Gauck and Ms Daniela Schadt at The Royal Palace. Their Royal Highnesses The Crown Prince and Crown Princess and Her Highness Princess Astrid, Mrs Ferner, will also be in attendance (20:00)
"Franca Sozzani presented an award to the HRH Crown Princess Mette-Marit of Norway: "She's always been really a true inspiration for me and all of us," she said. "She is never scared to find out the truth ... for her, this is only natural, because she sees everybody as equal ... she sees the people behind the diagnoses." After a long hug with "one of her closest friends," the princess dedicated the award to her friends in Malawi, sex workers in Nicaragua, the gay communities in major cities, health workers that "don't wear gloves when they wipe their patients tears," and victims all around the world. "They are my inspiration they should've been here with me tonight, and this award truly belongs to them." http://www.hollywoodreporter.com/news/sarah-jessica-parker-presents-award-711021
CP Mette-Marit will open the Bjørnsonfestivalen 2014 on August 27. Bjørnsonfestivalen was founded in 1992 and is the oldest literature festival in Norway. The festival's purpose is to promote interest in literature and writing. It is named after Bjørnson (1832-1910), the first Nobel laureate in literature. Kronprinsesse Mette-Marit åpner Bjørnsonfestivalen - Bjørnsonfestivalen 2014 Translation