Jennifer Lopez always focuses on her "wins"

She told Britain's OK! magazine: "It's about understanding who you are and what your strengths are.

"It's about playing to those things. It's not about focusing on the weaknesses or the times you fell down or the times you didn't win.

"Instead, I focus on, 'I did win that one time. And you know what, I can do it again. I am working and I am strong - and I can get through.'

"All of those things are what this movie's about but it's also a beautiful story about a mother and son. It's about family and I think a lot of people are going to enjoy it."

Jennifer - who has 16-year-old twins Max and Emme with ex-husband Marc Anthony - thinks 'Unstoppable' is a "difficult" watch in places but she believes its ultimately positive message is what the world needs "more than ever".

She said: "These are the types of movies that the world needs right now more than ever.

"Inspiring, uplifting, exciting and emotional.

"At times difficult to watch but so real and so moving. It's a perfect family movie. It will have you cheering while you hold back the tears."

Jennifer came to prominence when she took on the title role of the tragic pop singer in the 1997 biopic 'Selena' before turning to a career in music herself, with hits such as 'Jenny From the Block' and 'Waiting For Tonight' in the early 2000s.

But she has managed to keep a hand in acting, with appearances in 'Marry Me' and 'Shotgun Wedding' in recent years and ahead of two more upcoming films, she recently admitted that she only really does it for the "love of the art" above anything else.

She told Variety's 'Awards Circuit' podcast : "I do it for the love of the art. It's not about the awards or the accolades. It's about telling stories that matter - stories that make people feel seen, stories that inspire. That's what keeps me going."