Chrissy Teigen has confessed she sheds fake tears when husband John Legend performs his song 'All Of Me' at his concerts.

The 32-year-old model - who is expecting her second child with the musician - admitted to Jimmy Fallon on 'The Tonight Show' that she feels under pressure to get emotional when John dedicates the song to her because she knows his fans are watching her reaction to his words.

Chrissy owned up: ''Everyone turns to see if I'm crying. I either have to pretend or fake it.''

The 'Lip Sync Battle' star explained she first heard the song about 18 months before it came out and listened to it, ''for a long time''.

She added: ''It's a good song. I like it.''

Chrissy was famously caught on camera crying at the Golden Globe Awards in 2015 when John made his acceptance speech for winning Best Original Song for his track 'Glory', and the picture went viral.

The stunning star also revealed to Jimmy that she is five months into her pregnancy.

Chrissy and John - who already have a 21-month-old daughter Luna - announced in November they are expecting their second child and recently confirmed the baby is a boy.

Chrissy asked Jimmy to guess how far along she is in her pregnancy, and offered to let him touch her burgeoning bump, which he declined to do.

Jimmy said awkwardly: '''I don't know the right answer ... Umm. I'd say you're about five months?''

To which Chrissy replied: ''That's great. Yes, you got it. I just had to say it because everybody thinks I'm due tomorrow. Nope. Just second baby.''

Chrissy revealed the sex of her baby by sharing a picture of herself from the Grammy Awards red carpet with her burgeoning bump is on full display, and captioned it: ''mama and her baby boy (sic)''

It comes after Chrissy said she hoped her second child turns out to be just like his father, as she claims Luna is already taking after her a little too much.

She said: ''I hope baby two is like John a lot. Baby Luna's more like me ... and I realised I can be difficult.''