Just good lighting? Hayden Panettiere shows off her fuller curves in a plunging blouse

PUBLISHED: 19:49, 16 October 2012 | UPDATED: 19:50, 16 October 2012

Perhaps it was simply the studio lighting.

But Hayden Panettiere looked curvier than usual as she appeared on Good Morning America in a plunging blouse.

While the outfit looked conservative at first glance, the low cut neckline displayed the Nashville star's cleavage.

Plunging: Hayden Panettiere showed off her cleavage in a low cut blouse as she appeared on Good Morning America on Tuesday

Conservative? But while it was long sleeved her top displayed Hayden's cleavage

Conservative? While it was long sleeved her top displayed Hayden's cleavage

While Hayden looked bustier than usual the 23-year-old was as slender as ever in her black skinny jeans.

The blonde was promoting her hit series, in which she plays rising teen star Juliette Barnes.

Hayden showcases her skills as a singer in the role.

'It’s so much fun,' she told GMA. 'It’s a dream come true, honestly.

Singing star: Hayden talked about her love of country music; she plays a singer in Nashville

'I recorded for years when I was younger and I always said that my heart lays with country music.'

Even before finding fame in the TV show Heroes, Hayden had made a name for herself as a singer, winning a Grammy nomination for the 1999 track A Bug's Life Read-Along.

She had recorded the single while providing the voice of Dot on the hit movie.

All smiles: Hayden said her new role was a 'dream come true'

And Hayden revealed she is once more finding success as a singer off the back of the show.

'They’re releasing a lot of songs on iTunes. We had two drop today - Undermine and Telescope - which are two of my favorite songs that we’ve done thus far.'

Along with her successful career, Hayden is also happy in her love life.

She is currently dating NFL star Scotty McKnight, 24.