AceShowbiz -

Nicole Scherzinger has fueled speculation that she is engaged to boyfriend Lewis Hamilton after she was spotted sporting a ring on her engagement finger. The singer and the race car driver were leaving a hotel in Sao Paulo, Brazil, early this week when photographers snapped their pic that showed her flashing the ring as she put her left hand on his waist.

There have yet words from the lovers regarding the report. Nicole herself has been acting very open when asked about her romance with Lewis, whom she began dating in May this year.

Despite rumors claiming their romance had come to an end, Nicole told the press in September that she and Lewis were house hunting and planning to move in together. What's more, she also wrote a song for him titled "I Think I'm In Love". "It is a very personal song. It's very in-depth and emotional - a real song that I know is going to connect with people," she said about the track.

Recently, Nicole even posted a video online, declaring her love for Lewis hot on the heels of his winning at the Brazilian Grand Prix, making him the new Formula One world champion. "I'm so excited, I feel like I'm on top of the world right now," she said in the video. "Why? Because I want to congratulate my boyfriend Lewis Hamilton for being the official Formula One World Champion. Congratulations baby, I love you, I love you, I love you. It's all about the love and it's just good times."