There is no guide for this game yet. But apparently it is EASY POINTS! 

Vocal Pro - 10 points

Complete all the lessons in Sing It Pro.

Breakin' Free - 30 points

Complete all High School Musical songs.

You've Got The Music In You! - 30 points

Complete all High School Musical 2 songs.

Graduated! - 30 points

Complete all High School Musical 3 songs.

Sing It Fanatic - 50 points

Complete 50 songs.

Sing It uber-fan - 100 points

Complete 100 songs.

Sing It Superstar - 50 points

Complete every song in the tracklist in Solo mode.

Dynamic Duet - 50 points

Complete every song in the tracklist in Duet mode

Bop To The Top - 50 points

Get the top score on any song.

Show Time Double - 10 points

Perform a gig with 2 players.

Show Time - 10 points

Perform a solo gig.

Singing Without A Net - 10 points

Complete a song in You're On Your Own mode.

Party Starter - 10 points

Complete a song in Team Play mode.

In This Together - 10 points

Complete a song in Duet mode.

Head To Head - 10 points

Complete a song in Versus mode.

Natural Performer - 50 points

Hit 75% of the notes of any song in You're On Your Own mode.

Perfect Team - 100 points

Score over 1,000,000 in a duet.

You Got What It Takes - 50 points

Score over 500,000 on 20 songs.

Hey! Big Scorer - 100 points

Score over 750,000 on 20 songs.

Rackin' Up The Points - 30 points

Score over 750,000 on 10 songs.

Top Billing - 20 points

Score over 750,000 on any song in Solo mode.

Big Stake Battle - 20 points

Score over 750,000 on any song in Versus mode

Beautiful Harmony - 20 points

Score over 750,000 on any song in Duet mode.

You're a Professional! - 100 points

Score over 1,000,000 on any song in Solo mode.

Head's In The Game - 50 points

Hit a X4 multiplier.