Summer Terenzi celebrated her 20th birthday on Tuesday. Despite their strained relationship, her father Marc Terenzi (47) publicly congratulated her on Instagram. "Happy birthday, Summer. I know there are a lot of things standing between us right now", the American singer said in a clip. "But I want you to know that I love you. No matter what you do, I will always stand behind you, because I am your father and you are my daughter." He finds it difficult to find the right words. "So I'm going to do the only thing I'm good at." He has been working on a song for a while. "It's my 'I'm sorry' to you." He left open when the song will be released.

Daughter called him a "narcissist"

His daughter, who is from his previous marriage to Sarah Connor (46), had shared a snippet from her song "Daddy Issues" on Sunday. "My father never wanted kids, he's always been a narcissist", she sings in English. In an interview with "Bild", Terenzi admitted: "Summer is completely right." The musician explained: "Until a year ago, I was an alcoholic and addicted to substances and therefore couldn't be a good father." He regrets that.

He loves his children and hopes for a second chance. In addition to Summer, he has a son Tyler (22) with Sarah Connor. Marc Terenzi and Sarah Connor separated in 2008 after over four years of marriage, and they have been divorced since 2010. The singer, who among other things participated in and won the jungle camp in the past, also has two other children.

Summer Terenzi celebrates with her mother

Summer Terenzi spent her birthday with her mother Sarah Connor, her husband Florian Fischer (51), her brother, and a friend. Connor shared impressions in her Instagram story from the car, from an escape room, and a family photo with the Berlin TV Tower in the background. A clip shows the 20-year-old blowing out the candles on her birthday cake. "Happy birthday, Summita. There are no words to express how much I love you ... and I am so proud of you", Connor wrote.

In another story, she asked her daughter how it feels to be 20 years old. "I'm 20", Summer Terenzi cheered. "It feels good, really. Now the older guys can't say I'm too young anymore", she added laughing - and made her mother laugh too. "My favorite person in the whole world", Connor wrote. Summer reposted her mother's story with the words: "I love you, Mom".